./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/loops/nec11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/loops/nec11.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 956956519a5dd5945389347ef99ef2322ddc4acd ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:54:32,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:54:32,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:54:32,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:54:32,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:54:32,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:54:32,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:54:32,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:54:32,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:54:32,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:54:32,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:54:32,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:54:32,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:54:32,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:54:32,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:54:32,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:54:32,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:54:32,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:54:32,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:54:32,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:54:32,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:54:32,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:54:32,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:54:32,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:54:32,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:54:32,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:54:32,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:54:32,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:54:32,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:54:32,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:54:32,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:54:32,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:54:32,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:54:32,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:54:32,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:54:32,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:54:32,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:54:32,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:54:32,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:54:32,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:54:32,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:54:32,179 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-25 08:54:32,206 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:54:32,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:54:32,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:54:32,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:54:32,218 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:54:32,218 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-25 08:54:32,218 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-25 08:54:32,218 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-25 08:54:32,218 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-25 08:54:32,219 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-25 08:54:32,219 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-25 08:54:32,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:54:32,219 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:54:32,220 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:54:32,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:54:32,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:54:32,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:54:32,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-25 08:54:32,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-25 08:54:32,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-25 08:54:32,222 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:54:32,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:54:32,223 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-25 08:54:32,223 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:54:32,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-25 08:54:32,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:54:32,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:54:32,224 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-25 08:54:32,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:54:32,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:54:32,225 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-25 08:54:32,226 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-25 08:54:32,226 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/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(F end) ) 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 -> 956956519a5dd5945389347ef99ef2322ddc4acd [2019-11-25 08:54:32,366 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:54:32,382 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:54:32,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:54:32,386 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:54:32,387 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:54:32,387 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/bin/uautomizer/../../sv-benchmarks/c/loops/nec11.c [2019-11-25 08:54:32,448 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/bin/uautomizer/data/dee9f8961/a0e63e736ddf4014aaf55bde00c4c74b/FLAGe4ff7cd2e [2019-11-25 08:54:32,831 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:54:32,832 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/sv-benchmarks/c/loops/nec11.c [2019-11-25 08:54:32,837 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/bin/uautomizer/data/dee9f8961/a0e63e736ddf4014aaf55bde00c4c74b/FLAGe4ff7cd2e [2019-11-25 08:54:33,253 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/bin/uautomizer/data/dee9f8961/a0e63e736ddf4014aaf55bde00c4c74b [2019-11-25 08:54:33,256 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:54:33,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:54:33,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:54:33,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:54:33,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:54:33,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:54:33" (1/1) ... [2019-11-25 08:54:33,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3495567d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:33, skipping insertion in model container [2019-11-25 08:54:33,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:54:33" (1/1) ... [2019-11-25 08:54:33,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:54:33,287 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:54:33,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:54:33,470 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:54:33,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:54:33,555 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:54:33,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:33 WrapperNode [2019-11-25 08:54:33,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:54:33,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:54:33,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:54:33,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:54:33,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:33" (1/1) ... [2019-11-25 08:54:33,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:33" (1/1) ... [2019-11-25 08:54:33,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:54:33,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:54:33,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:54:33,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:54:33,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:33" (1/1) ... [2019-11-25 08:54:33,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:33" (1/1) ... [2019-11-25 08:54:33,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:33" (1/1) ... [2019-11-25 08:54:33,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:33" (1/1) ... [2019-11-25 08:54:33,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:33" (1/1) ... [2019-11-25 08:54:33,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:33" (1/1) ... [2019-11-25 08:54:33,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:33" (1/1) ... [2019-11-25 08:54:33,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:54:33,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:54:33,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:54:33,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:54:33,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:54:33,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:54:33,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:54:33,805 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:54:33,805 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-25 08:54:33,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:54:33 BoogieIcfgContainer [2019-11-25 08:54:33,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:54:33,807 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-25 08:54:33,807 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-25 08:54:33,810 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-25 08:54:33,811 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:54:33,811 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 25.11 08:54:33" (1/3) ... [2019-11-25 08:54:33,812 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@73819eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 08:54:33, skipping insertion in model container [2019-11-25 08:54:33,813 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:54:33,813 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:33" (2/3) ... [2019-11-25 08:54:33,813 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@73819eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 08:54:33, skipping insertion in model container [2019-11-25 08:54:33,814 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:54:33,814 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:54:33" (3/3) ... [2019-11-25 08:54:33,815 INFO L371 chiAutomizerObserver]: Analyzing ICFG nec11.c [2019-11-25 08:54:33,858 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-25 08:54:33,858 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-25 08:54:33,858 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-25 08:54:33,859 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:54:33,859 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:54:33,859 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-25 08:54:33,859 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:54:33,859 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-25 08:54:33,872 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states. [2019-11-25 08:54:33,887 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-25 08:54:33,888 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:54:33,888 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:54:33,892 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-25 08:54:33,892 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-25 08:54:33,892 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-25 08:54:33,893 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states. [2019-11-25 08:54:33,894 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-25 08:54:33,894 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:54:33,894 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:54:33,894 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-25 08:54:33,894 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-25 08:54:33,899 INFO L794 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~post1, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~i~0; 7#L19-2true [2019-11-25 08:54:33,900 INFO L796 eck$LassoCheckResult]: Loop: 7#L19-2true assume !!(0 != main_~c~0 % 256); 3#L21true assume 4 == main_~len~0;main_~len~0 := 0; 11#L21-2true assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 7#L19-2true [2019-11-25 08:54:33,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:33,904 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-25 08:54:33,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:33,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466680442] [2019-11-25 08:54:33,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:33,988 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:54:33,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:33,989 INFO L82 PathProgramCache]: Analyzing trace with hash 39821, now seen corresponding path program 1 times [2019-11-25 08:54:33,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:33,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323902169] [2019-11-25 08:54:33,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,013 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:54:34,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:34,014 INFO L82 PathProgramCache]: Analyzing trace with hash 963342, now seen corresponding path program 1 times [2019-11-25 08:54:34,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:34,014 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330754735] [2019-11-25 08:54:34,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:34,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330754735] [2019-11-25 08:54:34,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:34,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-25 08:54:34,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135251903] [2019-11-25 08:54:34,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:34,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:54:34,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:54:34,175 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-25 08:54:34,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:34,200 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-25 08:54:34,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:54:34,202 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 22 transitions. [2019-11-25 08:54:34,204 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-25 08:54:34,207 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 7 states and 8 transitions. [2019-11-25 08:54:34,208 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-11-25 08:54:34,208 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-11-25 08:54:34,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2019-11-25 08:54:34,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:54:34,209 INFO L688 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-11-25 08:54:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2019-11-25 08:54:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2019-11-25 08:54:34,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-25 08:54:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2019-11-25 08:54:34,236 INFO L711 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-11-25 08:54:34,236 INFO L591 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-11-25 08:54:34,236 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-25 08:54:34,236 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2019-11-25 08:54:34,236 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-25 08:54:34,237 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:54:34,237 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:54:34,237 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-25 08:54:34,237 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-25 08:54:34,238 INFO L794 eck$LassoCheckResult]: Stem: 45#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~post1, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~i~0; 46#L19-2 assume !!(0 != main_~c~0 % 256); 43#L21 assume !(4 == main_~len~0); 44#L21-2 [2019-11-25 08:54:34,238 INFO L796 eck$LassoCheckResult]: Loop: 44#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 47#L19-2 assume !!(0 != main_~c~0 % 256); 48#L21 assume 4 == main_~len~0;main_~len~0 := 0; 44#L21-2 [2019-11-25 08:54:34,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:34,238 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2019-11-25 08:54:34,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:34,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016274159] [2019-11-25 08:54:34,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,253 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:54:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:34,253 INFO L82 PathProgramCache]: Analyzing trace with hash 46451, now seen corresponding path program 2 times [2019-11-25 08:54:34,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:34,254 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273745953] [2019-11-25 08:54:34,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,266 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:54:34,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:34,266 INFO L82 PathProgramCache]: Analyzing trace with hash 925831567, now seen corresponding path program 1 times [2019-11-25 08:54:34,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:34,267 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795647740] [2019-11-25 08:54:34,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:34,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795647740] [2019-11-25 08:54:34,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284064512] [2019-11-25 08:54:34,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/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 [2019-11-25 08:54:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:34,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:54:34,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:34,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:34,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2019-11-25 08:54:34,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406359992] [2019-11-25 08:54:34,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:34,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:54:34,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:54:34,403 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. cyclomatic complexity: 2 Second operand 4 states. [2019-11-25 08:54:34,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:34,418 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2019-11-25 08:54:34,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:54:34,419 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 11 transitions. [2019-11-25 08:54:34,420 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-11-25 08:54:34,421 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 10 states and 11 transitions. [2019-11-25 08:54:34,421 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2019-11-25 08:54:34,421 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2019-11-25 08:54:34,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 11 transitions. [2019-11-25 08:54:34,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:54:34,422 INFO L688 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-25 08:54:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 11 transitions. [2019-11-25 08:54:34,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-11-25 08:54:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-25 08:54:34,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-25 08:54:34,423 INFO L711 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-25 08:54:34,424 INFO L591 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-25 08:54:34,424 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-25 08:54:34,424 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 10 transitions. [2019-11-25 08:54:34,424 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-11-25 08:54:34,424 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:54:34,425 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:54:34,425 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-25 08:54:34,425 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1] [2019-11-25 08:54:34,425 INFO L794 eck$LassoCheckResult]: Stem: 85#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~post1, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~i~0; 86#L19-2 assume !!(0 != main_~c~0 % 256); 91#L21 assume !(4 == main_~len~0); 88#L21-2 [2019-11-25 08:54:34,425 INFO L796 eck$LassoCheckResult]: Loop: 88#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 87#L19-2 assume !!(0 != main_~c~0 % 256); 83#L21 assume !(4 == main_~len~0); 84#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 90#L19-2 assume !!(0 != main_~c~0 % 256); 89#L21 assume 4 == main_~len~0;main_~len~0 := 0; 88#L21-2 [2019-11-25 08:54:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:34,426 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 2 times [2019-11-25 08:54:34,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:34,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695213335] [2019-11-25 08:54:34,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,434 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:54:34,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:34,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1383897983, now seen corresponding path program 1 times [2019-11-25 08:54:34,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:34,435 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125419090] [2019-11-25 08:54:34,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,460 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:54:34,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:34,461 INFO L82 PathProgramCache]: Analyzing trace with hash -831686173, now seen corresponding path program 2 times [2019-11-25 08:54:34,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:34,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628573706] [2019-11-25 08:54:34,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:34,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628573706] [2019-11-25 08:54:34,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463507586] [2019-11-25 08:54:34,520 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:34,553 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:54:34,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:54:34,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:54:34,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:34,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:34,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-25 08:54:34,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48387082] [2019-11-25 08:54:34,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:34,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:54:34,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:54:34,636 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. cyclomatic complexity: 2 Second operand 5 states. [2019-11-25 08:54:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:34,654 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-11-25 08:54:34,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:54:34,655 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2019-11-25 08:54:34,655 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2019-11-25 08:54:34,656 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 14 transitions. [2019-11-25 08:54:34,656 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2019-11-25 08:54:34,656 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2019-11-25 08:54:34,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 14 transitions. [2019-11-25 08:54:34,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:54:34,657 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-25 08:54:34,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 14 transitions. [2019-11-25 08:54:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-11-25 08:54:34,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-25 08:54:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-25 08:54:34,659 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-25 08:54:34,659 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-25 08:54:34,659 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-25 08:54:34,659 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 13 transitions. [2019-11-25 08:54:34,660 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-11-25 08:54:34,660 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:54:34,660 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:54:34,660 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-25 08:54:34,660 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 3, 2, 1] [2019-11-25 08:54:34,661 INFO L794 eck$LassoCheckResult]: Stem: 141#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~post1, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~i~0; 142#L19-2 assume !!(0 != main_~c~0 % 256); 150#L21 assume !(4 == main_~len~0); 145#L21-2 [2019-11-25 08:54:34,661 INFO L796 eck$LassoCheckResult]: Loop: 145#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 143#L19-2 assume !!(0 != main_~c~0 % 256); 144#L21 assume !(4 == main_~len~0); 148#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 149#L19-2 assume !!(0 != main_~c~0 % 256); 139#L21 assume !(4 == main_~len~0); 140#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 147#L19-2 assume !!(0 != main_~c~0 % 256); 146#L21 assume 4 == main_~len~0;main_~len~0 := 0; 145#L21-2 [2019-11-25 08:54:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:34,661 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 3 times [2019-11-25 08:54:34,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:34,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037325226] [2019-11-25 08:54:34,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,668 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:54:34,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:34,668 INFO L82 PathProgramCache]: Analyzing trace with hash 313813491, now seen corresponding path program 2 times [2019-11-25 08:54:34,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:34,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156765703] [2019-11-25 08:54:34,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,685 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:54:34,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:34,685 INFO L82 PathProgramCache]: Analyzing trace with hash 903627023, now seen corresponding path program 3 times [2019-11-25 08:54:34,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:34,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130254359] [2019-11-25 08:54:34,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:34,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130254359] [2019-11-25 08:54:34,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184444278] [2019-11-25 08:54:34,742 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:34,799 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-25 08:54:34,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:54:34,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:54:34,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:34,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:34,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-11-25 08:54:34,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203486592] [2019-11-25 08:54:34,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:34,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:54:34,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:54:34,916 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. cyclomatic complexity: 2 Second operand 6 states. [2019-11-25 08:54:34,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:34,945 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2019-11-25 08:54:34,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:54:34,946 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 17 transitions. [2019-11-25 08:54:34,947 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 13 [2019-11-25 08:54:34,947 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 16 states and 17 transitions. [2019-11-25 08:54:34,948 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-25 08:54:34,948 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2019-11-25 08:54:34,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 17 transitions. [2019-11-25 08:54:34,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:54:34,948 INFO L688 BuchiCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-25 08:54:34,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 17 transitions. [2019-11-25 08:54:34,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-11-25 08:54:34,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-25 08:54:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-25 08:54:34,950 INFO L711 BuchiCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-25 08:54:34,950 INFO L591 BuchiCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-25 08:54:34,950 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-25 08:54:34,951 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 16 transitions. [2019-11-25 08:54:34,951 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2019-11-25 08:54:34,951 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:54:34,951 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:54:34,952 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-25 08:54:34,952 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1] [2019-11-25 08:54:34,952 INFO L794 eck$LassoCheckResult]: Stem: 213#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~post1, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~i~0; 214#L19-2 assume !!(0 != main_~c~0 % 256); 211#L21 assume !(4 == main_~len~0); 212#L21-2 [2019-11-25 08:54:34,952 INFO L796 eck$LassoCheckResult]: Loop: 212#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 215#L19-2 assume !!(0 != main_~c~0 % 256); 225#L21 assume !(4 == main_~len~0); 224#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 223#L19-2 assume !!(0 != main_~c~0 % 256); 222#L21 assume !(4 == main_~len~0); 221#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 220#L19-2 assume !!(0 != main_~c~0 % 256); 219#L21 assume !(4 == main_~len~0); 217#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 218#L19-2 assume !!(0 != main_~c~0 % 256); 216#L21 assume 4 == main_~len~0;main_~len~0 := 0; 212#L21-2 [2019-11-25 08:54:34,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:34,952 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 4 times [2019-11-25 08:54:34,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:34,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477212388] [2019-11-25 08:54:34,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:34,977 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:54:34,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:34,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1326016769, now seen corresponding path program 3 times [2019-11-25 08:54:34,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:34,978 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896449151] [2019-11-25 08:54:34,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:35,012 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:54:35,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:35,014 INFO L82 PathProgramCache]: Analyzing trace with hash -902292893, now seen corresponding path program 4 times [2019-11-25 08:54:35,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:35,014 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722423434] [2019-11-25 08:54:35,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:54:35,053 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:54:35,189 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2019-11-25 08:54:35,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 25.11 08:54:35 BoogieIcfgContainer [2019-11-25 08:54:35,267 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-25 08:54:35,269 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:54:35,269 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:54:35,270 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:54:35,270 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:54:33" (3/4) ... [2019-11-25 08:54:35,274 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-11-25 08:54:35,335 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0517fb7a-8a36-4af7-9b67-73d4469dfc5c/bin/uautomizer/witness.graphml [2019-11-25 08:54:35,336 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:54:35,341 INFO L168 Benchmark]: Toolchain (without parser) took 2080.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 947.3 MB in the beginning and 981.9 MB in the end (delta: -34.6 MB). Peak memory consumption was 102.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:35,342 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:54:35,342 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -189.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:35,343 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.21 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:35,343 INFO L168 Benchmark]: Boogie Preprocessor took 16.44 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:35,344 INFO L168 Benchmark]: RCFGBuilder took 206.02 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: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:35,344 INFO L168 Benchmark]: BuchiAutomizer took 1460.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 983.7 MB in the end (delta: 129.8 MB). Peak memory consumption was 129.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:35,344 INFO L168 Benchmark]: Witness Printer took 66.57 ms. Allocated memory is still 1.2 GB. Free memory was 983.7 MB in the beginning and 981.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:35,346 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 297.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -189.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.21 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.44 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 206.02 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: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 1460.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 983.7 MB in the end (delta: 129.8 MB). Peak memory consumption was 129.8 MB. Max. memory is 11.5 GB. * Witness Printer took 66.57 ms. Allocated memory is still 1.2 GB. Free memory was 983.7 MB in the beginning and 981.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (4 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.4 modules have a trivial ranking function, the largest among these consists of 6 locations. The remainder module has 15 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.3s and 5 iterations. TraceHistogramMax:4. Analysis of lassos took 1.1s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 4. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 15 states and ocurred in iteration 4. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 18 SDtfs, 17 SDslu, 16 SDs, 0 SdLazy, 30 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc4 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 19]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {len=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@44dc87da=0, \result=0, c=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@44e9a928=0, i=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 21]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L13] int a[5]; [L14] int len=0; [L15] _Bool c=__VERIFIER_nondet_bool(); [L16] int i; [L19] COND TRUE \read(c) [L21] COND FALSE !(len==4) Loop: [L24] EXPR a[len] [L24] a[len]=0 [L26] len++ [L19] COND TRUE \read(c) [L21] COND FALSE !(len==4) [L24] EXPR a[len] [L24] a[len]=0 [L26] len++ [L19] COND TRUE \read(c) [L21] COND FALSE !(len==4) [L24] EXPR a[len] [L24] a[len]=0 [L26] len++ [L19] COND TRUE \read(c) [L21] COND FALSE !(len==4) [L24] EXPR a[len] [L24] a[len]=0 [L26] len++ [L19] COND TRUE \read(c) [L21] COND TRUE len==4 [L22] len =0 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...