./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-15/array20_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-15/array20_alloca.i -s /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/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 64bit --witnessprinter.graph.data.programhash 15cc26ae0dc42c909592f114b7003fa240a2d07d ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.2.0-69874e2 [2020-12-01 16:03:59,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 16:03:59,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 16:03:59,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 16:03:59,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 16:03:59,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 16:03:59,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 16:03:59,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 16:03:59,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 16:03:59,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 16:03:59,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 16:03:59,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 16:03:59,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 16:03:59,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 16:03:59,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 16:03:59,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 16:03:59,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 16:03:59,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 16:03:59,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 16:03:59,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 16:03:59,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 16:03:59,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 16:03:59,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 16:03:59,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 16:03:59,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 16:03:59,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 16:03:59,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 16:03:59,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 16:03:59,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 16:03:59,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 16:03:59,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 16:03:59,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 16:03:59,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 16:03:59,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 16:03:59,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 16:03:59,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 16:03:59,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 16:03:59,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 16:03:59,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 16:03:59,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 16:03:59,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 16:03:59,223 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-12-01 16:03:59,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 16:03:59,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 16:03:59,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 16:03:59,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 16:03:59,251 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 16:03:59,252 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-12-01 16:03:59,252 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-12-01 16:03:59,252 INFO L138 SettingsManager]: * Use old map elimination=false [2020-12-01 16:03:59,252 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-12-01 16:03:59,253 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-12-01 16:03:59,254 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-12-01 16:03:59,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 16:03:59,255 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-01 16:03:59,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 16:03:59,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 16:03:59,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-12-01 16:03:59,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-12-01 16:03:59,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-12-01 16:03:59,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 16:03:59,256 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-12-01 16:03:59,256 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 16:03:59,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-12-01 16:03:59,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 16:03:59,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 16:03:59,257 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-12-01 16:03:59,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 16:03:59,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 16:03:59,258 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 16:03:59,258 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-12-01 16:03:59,261 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-12-01 16:03:59,261 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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_917f0921-3683-4ee7-b38b-31f920a23915/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15cc26ae0dc42c909592f114b7003fa240a2d07d [2020-12-01 16:03:59,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 16:03:59,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 16:03:59,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 16:03:59,578 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 16:03:59,579 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 16:03:59,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/../../sv-benchmarks/c/termination-15/array20_alloca.i [2020-12-01 16:03:59,649 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/data/efc47d3a6/8dece24b16d24974b26647d86759920a/FLAG42275ddba [2020-12-01 16:04:00,191 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 16:04:00,192 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/sv-benchmarks/c/termination-15/array20_alloca.i [2020-12-01 16:04:00,204 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/data/efc47d3a6/8dece24b16d24974b26647d86759920a/FLAG42275ddba [2020-12-01 16:04:00,501 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/data/efc47d3a6/8dece24b16d24974b26647d86759920a [2020-12-01 16:04:00,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 16:04:00,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 16:04:00,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 16:04:00,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 16:04:00,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 16:04:00,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 04:04:00" (1/1) ... [2020-12-01 16:04:00,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58da67b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:04:00, skipping insertion in model container [2020-12-01 16:04:00,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 04:04:00" (1/1) ... [2020-12-01 16:04:00,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 16:04:00,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 16:04:00,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 16:04:00,967 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 16:04:01,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 16:04:01,114 INFO L208 MainTranslator]: Completed translation [2020-12-01 16:04:01,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:04:01 WrapperNode [2020-12-01 16:04:01,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 16:04:01,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 16:04:01,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 16:04:01,118 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 16:04:01,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:04:01" (1/1) ... [2020-12-01 16:04:01,149 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:04:01" (1/1) ... [2020-12-01 16:04:01,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 16:04:01,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 16:04:01,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 16:04:01,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 16:04:01,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:04:01" (1/1) ... [2020-12-01 16:04:01,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:04:01" (1/1) ... [2020-12-01 16:04:01,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:04:01" (1/1) ... [2020-12-01 16:04:01,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:04:01" (1/1) ... [2020-12-01 16:04:01,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:04:01" (1/1) ... [2020-12-01 16:04:01,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:04:01" (1/1) ... [2020-12-01 16:04:01,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:04:01" (1/1) ... [2020-12-01 16:04:01,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 16:04:01,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 16:04:01,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 16:04:01,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 16:04:01,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:04:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/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 [2020-12-01 16:04:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 16:04:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 16:04:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 16:04:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 16:04:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 16:04:01,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 16:04:01,504 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 16:04:01,505 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-01 16:04:01,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:04:01 BoogieIcfgContainer [2020-12-01 16:04:01,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 16:04:01,507 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-12-01 16:04:01,508 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-12-01 16:04:01,511 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-12-01 16:04:01,512 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-12-01 16:04:01,512 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 01.12 04:04:00" (1/3) ... [2020-12-01 16:04:01,520 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@26bc415c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 04:04:01, skipping insertion in model container [2020-12-01 16:04:01,520 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-12-01 16:04:01,520 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:04:01" (2/3) ... [2020-12-01 16:04:01,521 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@26bc415c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 04:04:01, skipping insertion in model container [2020-12-01 16:04:01,521 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-12-01 16:04:01,521 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:04:01" (3/3) ... [2020-12-01 16:04:01,522 INFO L389 chiAutomizerObserver]: Analyzing ICFG array20_alloca.i [2020-12-01 16:04:01,588 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-12-01 16:04:01,588 INFO L360 BuchiCegarLoop]: Hoare is false [2020-12-01 16:04:01,588 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-12-01 16:04:01,589 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 16:04:01,594 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 16:04:01,594 INFO L364 BuchiCegarLoop]: Difference is false [2020-12-01 16:04:01,594 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 16:04:01,607 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-12-01 16:04:01,619 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-12-01 16:04:01,651 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2020-12-01 16:04:01,652 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 16:04:01,652 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 16:04:01,658 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-12-01 16:04:01,658 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-12-01 16:04:01,658 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-12-01 16:04:01,659 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-12-01 16:04:01,660 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2020-12-01 16:04:01,660 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 16:04:01,661 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 16:04:01,661 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-12-01 16:04:01,661 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-12-01 16:04:01,669 INFO L794 eck$LassoCheckResult]: Stem: 9#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 7#L-1true havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~mem209, main_#t~post207, main_#t~mem210, main_~i~0, main_~j~0, main_~length~0, main_~arr~0.base, main_~arr~0.offset;havoc main_~i~0;havoc main_~j~0;main_~length~0 := main_#t~nondet205;havoc main_#t~nondet205; 15#L367true assume !(main_~length~0 < 1); 4#L367-2true call main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.allocOnStack(4 * main_~length~0);main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 12#L369true assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 16#L370-3true [2020-12-01 16:04:01,670 INFO L796 eck$LassoCheckResult]: Loop: 16#L370-3true assume !!(main_~i~0 < main_~length~0);call write~int(main_#t~nondet208, main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4);havoc main_#t~nondet208;call main_#t~mem209 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4); 8#L372true assume main_#t~mem209 < 1;havoc main_#t~mem209;call write~int(1, main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4); 14#L370-2true main_#t~post207 := main_~i~0;main_~i~0 := 1 + main_#t~post207;havoc main_#t~post207; 16#L370-3true [2020-12-01 16:04:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:04:01,676 INFO L82 PathProgramCache]: Analyzing trace with hash 28695753, now seen corresponding path program 1 times [2020-12-01 16:04:01,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:04:01,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903431496] [2020-12-01 16:04:01,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:04:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:04:01,765 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:04:01,778 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:01,800 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 16:04:01,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:04:01,802 INFO L82 PathProgramCache]: Analyzing trace with hash 51737, now seen corresponding path program 1 times [2020-12-01 16:04:01,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:04:01,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414235752] [2020-12-01 16:04:01,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:04:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:04:01,831 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:04:01,842 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:01,846 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 16:04:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:04:01,848 INFO L82 PathProgramCache]: Analyzing trace with hash 176707665, now seen corresponding path program 1 times [2020-12-01 16:04:01,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:04:01,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111766839] [2020-12-01 16:04:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:04:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:04:01,870 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:04:01,900 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:01,905 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 16:04:02,185 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 16:04:02,185 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 16:04:02,186 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 16:04:02,186 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 16:04:02,186 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 16:04:02,186 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 16:04:02,186 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 16:04:02,186 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 16:04:02,187 INFO L133 ssoRankerPreferences]: Filename of dumped script: array20_alloca.i_Iteration1_Lasso [2020-12-01 16:04:02,187 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 16:04:02,187 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 16:04:02,211 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 16:04:02,217 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 16:04:02,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 16:04:02,224 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 16:04:02,229 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 16:04:02,236 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 16:04:02,368 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 16:04:02,371 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 16:04:02,374 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 16:04:02,378 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 16:04:02,606 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 16:04:02,610 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 16:04:02,626 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-12-01 16:04:02,629 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 16:04:02,629 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 16:04:02,629 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 16:04:02,630 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 16:04:02,630 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 16:04:02,632 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 16:04:02,632 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 16:04:02,641 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/z3 Starting monitored process 3 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 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 16:04:02,670 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-12-01 16:04:02,672 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 16:04:02,672 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 16:04:02,672 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 16:04:02,672 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 16:04:02,672 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 16:04:02,673 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 16:04:02,673 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 16:04:02,693 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 16:04:02,736 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-12-01 16:04:02,737 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 16:04:02,738 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 16:04:02,738 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 16:04:02,738 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 16:04:02,738 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 16:04:02,739 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 16:04:02,739 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 16:04:02,763 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 16:04:02,804 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-12-01 16:04:02,806 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 16:04:02,806 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 16:04:02,806 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 16:04:02,806 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 16:04:02,810 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-12-01 16:04:02,811 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 16:04:02,816 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/z3 Starting monitored process 6 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 16:04:02,856 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-12-01 16:04:02,857 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 16:04:02,858 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 16:04:02,858 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 16:04:02,858 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 16:04:02,858 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 16:04:02,860 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 16:04:02,860 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 16:04:02,874 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 16:04:02,901 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-12-01 16:04:02,903 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 16:04:02,904 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 16:04:02,904 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 16:04:02,904 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 16:04:02,920 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-12-01 16:04:02,921 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 16:04:02,943 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 16:04:02,979 INFO L443 ModelExtractionUtils]: Simplification made 10 calls to the SMT solver. [2020-12-01 16:04:02,979 INFO L444 ModelExtractionUtils]: 6 out of 22 variables were initially zero. Simplification set additionally 12 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 16:04:02,989 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 16:04:03,013 INFO L438 nArgumentSynthesizer]: Removed 1 redundant supporting invariants from a total of 2. [2020-12-01 16:04:03,013 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 16:04:03,014 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, v_rep(select #length ULTIMATE.start_main_#t~malloc206.base)_1) = -4*ULTIMATE.start_main_~i~0 + 1*v_rep(select #length ULTIMATE.start_main_#t~malloc206.base)_1 Supporting invariants [1*ULTIMATE.start_main_~arr~0.offset >= 0] [2020-12-01 16:04:03,063 INFO L297 tatePredicateManager]: 2 out of 4 supporting invariants were superfluous and have been removed [2020-12-01 16:04:03,076 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-12-01 16:04:03,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:04:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:04:03,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 16:04:03,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 16:04:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:04:03,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 16:04:03,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 16:04:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:04:03,251 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 2 loop predicates [2020-12-01 16:04:03,252 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 4 states. [2020-12-01 16:04:03,338 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states.. Second operand 4 states. Result 29 states and 41 transitions. Complement of second has 9 states. [2020-12-01 16:04:03,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-12-01 16:04:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-12-01 16:04:03,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 26 transitions. [2020-12-01 16:04:03,343 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 5 letters. Loop has 3 letters. [2020-12-01 16:04:03,344 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 16:04:03,344 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 8 letters. Loop has 3 letters. [2020-12-01 16:04:03,344 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 16:04:03,344 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 5 letters. Loop has 6 letters. [2020-12-01 16:04:03,345 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 16:04:03,346 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 41 transitions. [2020-12-01 16:04:03,352 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-12-01 16:04:03,356 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 11 states and 15 transitions. [2020-12-01 16:04:03,357 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-12-01 16:04:03,357 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-12-01 16:04:03,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 15 transitions. [2020-12-01 16:04:03,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-12-01 16:04:03,358 INFO L692 BuchiCegarLoop]: Abstraction has 11 states and 15 transitions. [2020-12-01 16:04:03,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 15 transitions. [2020-12-01 16:04:03,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-01 16:04:03,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-01 16:04:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2020-12-01 16:04:03,384 INFO L715 BuchiCegarLoop]: Abstraction has 11 states and 15 transitions. [2020-12-01 16:04:03,384 INFO L595 BuchiCegarLoop]: Abstraction has 11 states and 15 transitions. [2020-12-01 16:04:03,384 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-12-01 16:04:03,385 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 15 transitions. [2020-12-01 16:04:03,386 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-12-01 16:04:03,387 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 16:04:03,387 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 16:04:03,387 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-01 16:04:03,387 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-12-01 16:04:03,388 INFO L794 eck$LassoCheckResult]: Stem: 124#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 120#L-1 havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~mem209, main_#t~post207, main_#t~mem210, main_~i~0, main_~j~0, main_~length~0, main_~arr~0.base, main_~arr~0.offset;havoc main_~i~0;havoc main_~j~0;main_~length~0 := main_#t~nondet205;havoc main_#t~nondet205; 121#L367 assume !(main_~length~0 < 1); 125#L367-2 call main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.allocOnStack(4 * main_~length~0);main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 126#L369 assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 127#L370-3 assume !(main_~i~0 < main_~length~0); 122#L370-4 main_~j~0 := 1; 123#L377-2 [2020-12-01 16:04:03,389 INFO L796 eck$LassoCheckResult]: Loop: 123#L377-2 assume !!(1 <= main_~j~0 && main_~j~0 < main_~length~0);call main_#t~mem210 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~j~0, 4);main_~j~0 := main_~j~0 * main_#t~mem210;havoc main_#t~mem210; 123#L377-2 [2020-12-01 16:04:03,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:04:03,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1806815510, now seen corresponding path program 1 times [2020-12-01 16:04:03,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:04:03,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223845730] [2020-12-01 16:04:03,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:04:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:04:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:04:03,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223845730] [2020-12-01 16:04:03,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 16:04:03,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 16:04:03,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457224825] [2020-12-01 16:04:03,480 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-12-01 16:04:03,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:04:03,480 INFO L82 PathProgramCache]: Analyzing trace with hash 73, now seen corresponding path program 1 times [2020-12-01 16:04:03,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:04:03,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705860511] [2020-12-01 16:04:03,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:04:03,490 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 16:04:03,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467269033] [2020-12-01 16:04:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 16:04:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:04:03,523 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:04:03,527 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:03,560 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 16:04:03,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 16:04:03,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 16:04:03,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-01 16:04:03,604 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-12-01 16:04:03,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 16:04:03,655 INFO L93 Difference]: Finished difference Result 13 states and 17 transitions. [2020-12-01 16:04:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 16:04:03,656 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 17 transitions. [2020-12-01 16:04:03,656 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-12-01 16:04:03,657 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 17 transitions. [2020-12-01 16:04:03,657 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-12-01 16:04:03,657 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-12-01 16:04:03,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 17 transitions. [2020-12-01 16:04:03,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-12-01 16:04:03,658 INFO L692 BuchiCegarLoop]: Abstraction has 13 states and 17 transitions. [2020-12-01 16:04:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 17 transitions. [2020-12-01 16:04:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2020-12-01 16:04:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-01 16:04:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2020-12-01 16:04:03,660 INFO L715 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2020-12-01 16:04:03,660 INFO L595 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2020-12-01 16:04:03,660 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-12-01 16:04:03,660 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 14 transitions. [2020-12-01 16:04:03,661 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-12-01 16:04:03,661 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 16:04:03,661 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 16:04:03,661 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 16:04:03,661 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-12-01 16:04:03,662 INFO L794 eck$LassoCheckResult]: Stem: 155#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 149#L-1 havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~mem209, main_#t~post207, main_#t~mem210, main_~i~0, main_~j~0, main_~length~0, main_~arr~0.base, main_~arr~0.offset;havoc main_~i~0;havoc main_~j~0;main_~length~0 := main_#t~nondet205;havoc main_#t~nondet205; 150#L367 assume !(main_~length~0 < 1); 156#L367-2 call main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.allocOnStack(4 * main_~length~0);main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 157#L369 assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 158#L370-3 assume !!(main_~i~0 < main_~length~0);call write~int(main_#t~nondet208, main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4);havoc main_#t~nondet208;call main_#t~mem209 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4); 151#L372 assume !(main_#t~mem209 < 1);havoc main_#t~mem209; 152#L370-2 main_#t~post207 := main_~i~0;main_~i~0 := 1 + main_#t~post207;havoc main_#t~post207; 159#L370-3 assume !(main_~i~0 < main_~length~0); 153#L370-4 main_~j~0 := 1; 154#L377-2 [2020-12-01 16:04:03,662 INFO L796 eck$LassoCheckResult]: Loop: 154#L377-2 assume !!(1 <= main_~j~0 && main_~j~0 < main_~length~0);call main_#t~mem210 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~j~0, 4);main_~j~0 := main_~j~0 * main_#t~mem210;havoc main_#t~mem210; 154#L377-2 [2020-12-01 16:04:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:04:03,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1982565540, now seen corresponding path program 1 times [2020-12-01 16:04:03,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:04:03,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141940028] [2020-12-01 16:04:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:04:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:04:03,689 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:04:03,699 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:03,703 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 16:04:03,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:04:03,704 INFO L82 PathProgramCache]: Analyzing trace with hash 73, now seen corresponding path program 2 times [2020-12-01 16:04:03,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:04:03,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255623392] [2020-12-01 16:04:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:04:03,707 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 16:04:03,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881704466] [2020-12-01 16:04:03,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 16:04:03,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-01 16:04:03,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-01 16:04:03,739 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:04:03,750 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:03,754 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 16:04:03,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:04:03,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1329989554, now seen corresponding path program 1 times [2020-12-01 16:04:03,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:04:03,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461811846] [2020-12-01 16:04:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:04:03,763 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 16:04:03,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618875801] [2020-12-01 16:04:03,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 16:04:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:04:03,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 16:04:03,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 16:04:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:04:03,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461811846] [2020-12-01 16:04:03,914 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 16:04:03,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618875801] [2020-12-01 16:04:03,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 16:04:03,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-01 16:04:03,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916198424] [2020-12-01 16:04:03,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 16:04:03,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 16:04:03,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-01 16:04:03,940 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. cyclomatic complexity: 5 Second operand 6 states. [2020-12-01 16:04:04,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 16:04:04,020 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2020-12-01 16:04:04,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 16:04:04,020 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 31 transitions. [2020-12-01 16:04:04,026 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-12-01 16:04:04,029 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 16 states and 20 transitions. [2020-12-01 16:04:04,029 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-12-01 16:04:04,029 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-12-01 16:04:04,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 20 transitions. [2020-12-01 16:04:04,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-12-01 16:04:04,030 INFO L692 BuchiCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-12-01 16:04:04,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 20 transitions. [2020-12-01 16:04:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-12-01 16:04:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-01 16:04:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-12-01 16:04:04,032 INFO L715 BuchiCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-12-01 16:04:04,032 INFO L595 BuchiCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-12-01 16:04:04,032 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-12-01 16:04:04,032 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 17 transitions. [2020-12-01 16:04:04,036 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-12-01 16:04:04,036 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 16:04:04,036 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 16:04:04,037 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 16:04:04,037 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-12-01 16:04:04,037 INFO L794 eck$LassoCheckResult]: Stem: 237#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 233#L-1 havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~mem209, main_#t~post207, main_#t~mem210, main_~i~0, main_~j~0, main_~length~0, main_~arr~0.base, main_~arr~0.offset;havoc main_~i~0;havoc main_~j~0;main_~length~0 := main_#t~nondet205;havoc main_#t~nondet205; 234#L367 assume !(main_~length~0 < 1); 238#L367-2 call main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.allocOnStack(4 * main_~length~0);main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 239#L369 assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 240#L370-3 assume !!(main_~i~0 < main_~length~0);call write~int(main_#t~nondet208, main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4);havoc main_#t~nondet208;call main_#t~mem209 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4); 242#L372 assume !(main_#t~mem209 < 1);havoc main_#t~mem209; 244#L370-2 main_#t~post207 := main_~i~0;main_~i~0 := 1 + main_#t~post207;havoc main_#t~post207; 243#L370-3 assume !!(main_~i~0 < main_~length~0);call write~int(main_#t~nondet208, main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4);havoc main_#t~nondet208;call main_#t~mem209 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~i~0, 4); 231#L372 assume !(main_#t~mem209 < 1);havoc main_#t~mem209; 232#L370-2 main_#t~post207 := main_~i~0;main_~i~0 := 1 + main_#t~post207;havoc main_#t~post207; 241#L370-3 assume !(main_~i~0 < main_~length~0); 235#L370-4 main_~j~0 := 1; 236#L377-2 [2020-12-01 16:04:04,037 INFO L796 eck$LassoCheckResult]: Loop: 236#L377-2 assume !!(1 <= main_~j~0 && main_~j~0 < main_~length~0);call main_#t~mem210 := read~int(main_~arr~0.base, main_~arr~0.offset + 4 * main_~j~0, 4);main_~j~0 := main_~j~0 * main_#t~mem210;havoc main_#t~mem210; 236#L377-2 [2020-12-01 16:04:04,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:04:04,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1781949270, now seen corresponding path program 2 times [2020-12-01 16:04:04,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:04:04,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771413369] [2020-12-01 16:04:04,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:04:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:04:04,071 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:04:04,095 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:04,111 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 16:04:04,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:04:04,112 INFO L82 PathProgramCache]: Analyzing trace with hash 73, now seen corresponding path program 3 times [2020-12-01 16:04:04,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:04:04,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136457947] [2020-12-01 16:04:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:04:04,120 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 16:04:04,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656855564] [2020-12-01 16:04:04,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-12-01 16:04:04,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-01 16:04:04,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-01 16:04:04,153 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:04:04,156 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 16:04:04,164 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 16:04:04,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:04:04,165 INFO L82 PathProgramCache]: Analyzing trace with hash -594147436, now seen corresponding path program 2 times [2020-12-01 16:04:04,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 16:04:04,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693323550] [2020-12-01 16:04:04,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 16:04:04,184 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 16:04:04,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383901459] [2020-12-01 16:04:04,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 16:04:04,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 16:04:04,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-01 16:04:04,239 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:04:04,251 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:04:04,265 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 16:04:04,519 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2020-12-01 16:04:04,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 01.12 04:04:04 BoogieIcfgContainer [2020-12-01 16:04:04,631 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-12-01 16:04:04,631 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 16:04:04,631 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 16:04:04,631 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 16:04:04,632 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:04:01" (3/4) ... [2020-12-01 16:04:04,635 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-12-01 16:04:04,686 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_917f0921-3683-4ee7-b38b-31f920a23915/bin/uautomizer/witness.graphml [2020-12-01 16:04:04,687 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 16:04:04,688 INFO L168 Benchmark]: Toolchain (without parser) took 4183.15 ms. Allocated memory was 94.4 MB in the beginning and 144.7 MB in the end (delta: 50.3 MB). Free memory was 63.8 MB in the beginning and 66.5 MB in the end (delta: -2.7 MB). Peak memory consumption was 48.0 MB. Max. memory is 16.1 GB. [2020-12-01 16:04:04,688 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 94.4 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 16:04:04,689 INFO L168 Benchmark]: CACSL2BoogieTranslator took 610.10 ms. Allocated memory is still 94.4 MB. Free memory was 63.6 MB in the beginning and 54.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 16:04:04,689 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.22 ms. Allocated memory is still 94.4 MB. Free memory was 54.6 MB in the beginning and 52.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 16:04:04,690 INFO L168 Benchmark]: Boogie Preprocessor took 22.34 ms. Allocated memory is still 94.4 MB. Free memory was 52.8 MB in the beginning and 51.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 16:04:04,695 INFO L168 Benchmark]: RCFGBuilder took 312.39 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 51.7 MB in the beginning and 91.4 MB in the end (delta: -39.7 MB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. [2020-12-01 16:04:04,695 INFO L168 Benchmark]: BuchiAutomizer took 3123.29 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 91.4 MB in the beginning and 68.6 MB in the end (delta: 22.8 MB). Peak memory consumption was 49.1 MB. Max. memory is 16.1 GB. [2020-12-01 16:04:04,696 INFO L168 Benchmark]: Witness Printer took 55.50 ms. Allocated memory is still 144.7 MB. Free memory was 67.5 MB in the beginning and 66.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 16:04:04,698 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 94.4 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 610.10 ms. Allocated memory is still 94.4 MB. Free memory was 63.6 MB in the beginning and 54.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.22 ms. Allocated memory is still 94.4 MB. Free memory was 54.6 MB in the beginning and 52.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.34 ms. Allocated memory is still 94.4 MB. Free memory was 52.8 MB in the beginning and 51.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 312.39 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 51.7 MB in the beginning and 91.4 MB in the end (delta: -39.7 MB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 3123.29 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 91.4 MB in the beginning and 68.6 MB in the end (delta: 22.8 MB). Peak memory consumption was 49.1 MB. Max. memory is 16.1 GB. * Witness Printer took 55.50 ms. Allocated memory is still 144.7 MB. Free memory was 67.5 MB in the beginning and 66.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #length * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (2 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -4 * i + unknown-#length-unknown[__builtin_alloca(length*sizeof(int))] and consists of 6 locations. 2 modules have a trivial ranking function, the largest among these consists of 6 locations. The remainder module has 14 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.0s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 2.4s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 14 states and ocurred in iteration 3. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 25 SDtfs, 53 SDslu, 27 SDs, 0 SdLazy, 62 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT0 SILN0 SILU1 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital102 mio100 ax100 hnf100 lsp91 ukn80 mio100 lsp63 div100 bol100 ite100 ukn100 eq166 hnf91 smp100 dnf100 smp100 tf100 neg100 sie102 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 21ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: 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: 377]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=1} State at position 1 is {NULL=0, \result=0, NULL=1, arr=2, arr=0, i=2, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@a249bc1=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@137d0c3e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@f7a2dc5=0, length=2, org.eclipse.cdt.internal.core.dom.parser.c.CASTArraySubscriptExpression@13f92563=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@f7a2dc5=2, j=1, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTArraySubscriptExpression@631098d3=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@5842c503=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 377]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L365] int i, j; [L366] int length = __VERIFIER_nondet_int(); [L367] COND FALSE !(length < 1) [L368] int *arr = __builtin_alloca(length*sizeof(int)); [L369] COND FALSE !(!arr) [L370] i=0 [L370] COND TRUE i