./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 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-15/array20_alloca.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 0.1.25-9a8b2e8 [2020-10-20 06:42:31,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:42:31,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:42:31,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:42:31,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:42:31,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:42:31,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:42:31,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:42:31,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:42:31,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:42:31,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:42:31,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:42:31,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:42:31,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:42:31,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:42:31,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:42:31,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:42:31,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:42:31,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:42:31,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:42:31,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:42:31,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:42:31,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:42:31,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:42:31,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:42:31,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:42:31,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:42:31,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:42:31,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:42:31,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:42:31,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:42:31,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:42:31,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:42:31,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:42:31,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:42:31,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:42:31,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:42:32,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:42:32,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:42:32,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:42:32,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:42:32,004 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-20 06:42:32,027 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:42:32,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:42:32,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:42:32,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:42:32,029 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:42:32,030 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 06:42:32,030 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 06:42:32,030 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 06:42:32,030 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 06:42:32,031 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 06:42:32,031 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 06:42:32,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:42:32,031 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:42:32,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:42:32,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:42:32,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 06:42:32,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 06:42:32,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 06:42:32,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:42:32,033 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 06:42:32,033 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:42:32,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 06:42:32,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:42:32,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:42:32,034 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 06:42:32,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:42:32,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:42:32,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:42:32,035 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 06:42:32,036 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 06:42:32,037 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 [2020-10-20 06:42:32,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:42:32,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:42:32,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:42:32,246 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:42:32,246 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:42:32,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-15/array20_alloca.i [2020-10-20 06:42:32,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64719e1a1/343401b94d6c459eae2cf1a3a1a9a18c/FLAGa62b9b8f5 [2020-10-20 06:42:32,894 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:42:32,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-15/array20_alloca.i [2020-10-20 06:42:32,905 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64719e1a1/343401b94d6c459eae2cf1a3a1a9a18c/FLAGa62b9b8f5 [2020-10-20 06:42:33,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64719e1a1/343401b94d6c459eae2cf1a3a1a9a18c [2020-10-20 06:42:33,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:42:33,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:42:33,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:42:33,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:42:33,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:42:33,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:42:33" (1/1) ... [2020-10-20 06:42:33,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515ee39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:42:33, skipping insertion in model container [2020-10-20 06:42:33,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:42:33" (1/1) ... [2020-10-20 06:42:33,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:42:33,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:42:33,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:42:33,531 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:42:33,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:42:33,648 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:42:33,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:42:33 WrapperNode [2020-10-20 06:42:33,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:42:33,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:42:33,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:42:33,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:42:33,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:42:33" (1/1) ... [2020-10-20 06:42:33,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:42:33" (1/1) ... [2020-10-20 06:42:33,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:42:33,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:42:33,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:42:33,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:42:33,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:42:33" (1/1) ... [2020-10-20 06:42:33,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:42:33" (1/1) ... [2020-10-20 06:42:33,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:42:33" (1/1) ... [2020-10-20 06:42:33,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:42:33" (1/1) ... [2020-10-20 06:42:33,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:42:33" (1/1) ... [2020-10-20 06:42:33,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:42:33" (1/1) ... [2020-10-20 06:42:33,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:42:33" (1/1) ... [2020-10-20 06:42:33,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:42:33,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:42:33,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:42:33,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:42:33,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:42:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:42:33,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 06:42:33,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 06:42:33,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:42:33,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 06:42:33,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:42:33,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:42:34,120 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:42:34,120 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 06:42:34,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:42:34 BoogieIcfgContainer [2020-10-20 06:42:34,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:42:34,122 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 06:42:34,123 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 06:42:34,126 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 06:42:34,127 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:42:34,127 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 06:42:33" (1/3) ... [2020-10-20 06:42:34,128 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3bc98ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:42:34, skipping insertion in model container [2020-10-20 06:42:34,128 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:42:34,128 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:42:33" (2/3) ... [2020-10-20 06:42:34,129 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3bc98ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:42:34, skipping insertion in model container [2020-10-20 06:42:34,129 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:42:34,129 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:42:34" (3/3) ... [2020-10-20 06:42:34,131 INFO L373 chiAutomizerObserver]: Analyzing ICFG array20_alloca.i [2020-10-20 06:42:34,175 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 06:42:34,175 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 06:42:34,175 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 06:42:34,175 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:42:34,175 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:42:34,176 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 06:42:34,176 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:42:34,176 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 06:42:34,189 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-10-20 06:42:34,207 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2020-10-20 06:42:34,207 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:42:34,208 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:42:34,213 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-20 06:42:34,213 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 06:42:34,214 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 06:42:34,214 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-10-20 06:42:34,215 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2020-10-20 06:42:34,215 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:42:34,216 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:42:34,216 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-20 06:42:34,216 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 06:42:34,222 INFO L794 eck$LassoCheckResult]: Stem: 9#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 7#L-1true havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~mem209, main_#t~post207, main_#t~mem210, main_~i~0, main_~j~0, main_~length~0, main_~arr~0.base, main_~arr~0.offset;havoc main_~i~0;havoc main_~j~0;main_~length~0 := main_#t~nondet205;havoc main_#t~nondet205; 15#L367true assume !(main_~length~0 < 1); 4#L367-2true call main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.allocOnStack(4 * main_~length~0);main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 12#L369true assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 16#L370-3true [2020-10-20 06:42:34,222 INFO L796 eck$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 [2020-10-20 06:42:34,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:42:34,227 INFO L82 PathProgramCache]: Analyzing trace with hash 28695753, now seen corresponding path program 1 times [2020-10-20 06:42:34,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:42:34,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736162120] [2020-10-20 06:42:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:42:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:42:34,319 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:42:34,329 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:34,357 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:42:34,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:42:34,358 INFO L82 PathProgramCache]: Analyzing trace with hash 51737, now seen corresponding path program 1 times [2020-10-20 06:42:34,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:42:34,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858022628] [2020-10-20 06:42:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:42:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:42:34,369 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:42:34,377 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:34,381 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:42:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:42:34,384 INFO L82 PathProgramCache]: Analyzing trace with hash 176707665, now seen corresponding path program 1 times [2020-10-20 06:42:34,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:42:34,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117812491] [2020-10-20 06:42:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:42:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:42:34,404 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:42:34,421 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:34,427 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:42:34,680 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:42:34,681 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:42:34,681 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:42:34,682 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:42:34,682 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:42:34,682 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:42:34,682 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:42:34,683 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:42:34,683 INFO L133 ssoRankerPreferences]: Filename of dumped script: array20_alloca.i_Iteration1_Lasso [2020-10-20 06:42:34,683 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:42:34,684 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:42:34,713 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:42:34,723 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:42:34,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:42:34,731 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:42:34,737 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:42:34,740 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:42:34,954 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:42:34,957 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:42:34,961 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:42:34,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:42:35,197 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:42:35,203 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:42:35,221 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 Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:42:35,223 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:42:35,224 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:42:35,224 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:42:35,224 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:42:35,225 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:42:35,227 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:42:35,227 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:42:35,230 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:42:35,257 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 [2020-10-20 06:42:35,259 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:42:35,259 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:42:35,259 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:42:35,259 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:42:35,260 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:42:35,260 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:42:35,261 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:42:35,262 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 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 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:42:35,289 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 [2020-10-20 06:42:35,291 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:42:35,291 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:42:35,291 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:42:35,291 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:42:35,291 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:42:35,292 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:42:35,292 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:42:35,297 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:42:35,330 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 [2020-10-20 06:42:35,331 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:42:35,332 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:42:35,332 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:42:35,332 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:42:35,337 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:42:35,337 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:42:35,343 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:42:35,371 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 [2020-10-20 06:42:35,373 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:42:35,373 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:42:35,373 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:42:35,374 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:42:35,374 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:42:35,375 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:42:35,375 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:42:35,377 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:42:35,406 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 [2020-10-20 06:42:35,407 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:42:35,408 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:42:35,408 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:42:35,408 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:42:35,432 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:42:35,434 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:42:35,449 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:42:35,499 INFO L443 ModelExtractionUtils]: Simplification made 10 calls to the SMT solver. [2020-10-20 06:42:35,499 INFO L444 ModelExtractionUtils]: 6 out of 22 variables were initially zero. Simplification set additionally 12 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:42:35,507 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:42:35,512 INFO L438 nArgumentSynthesizer]: Removed 1 redundant supporting invariants from a total of 2. [2020-10-20 06:42:35,512 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:42:35,513 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] [2020-10-20 06:42:35,561 INFO L297 tatePredicateManager]: 2 out of 4 supporting invariants were superfluous and have been removed [2020-10-20 06:42:35,618 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-10-20 06:42:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:42:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:42:35,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 06:42:35,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:42:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:42:35,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 06:42:35,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:42:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:42:35,763 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 [2020-10-20 06:42:35,765 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 4 states. [2020-10-20 06:42:35,848 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. [2020-10-20 06:42:35,849 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 [2020-10-20 06:42:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 06:42:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 26 transitions. [2020-10-20 06:42:35,853 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 5 letters. Loop has 3 letters. [2020-10-20 06:42:35,855 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:42:35,855 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 8 letters. Loop has 3 letters. [2020-10-20 06:42:35,855 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:42:35,856 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 5 letters. Loop has 6 letters. [2020-10-20 06:42:35,856 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:42:35,857 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 41 transitions. [2020-10-20 06:42:35,860 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-20 06:42:35,865 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 11 states and 15 transitions. [2020-10-20 06:42:35,866 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-10-20 06:42:35,866 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-10-20 06:42:35,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 15 transitions. [2020-10-20 06:42:35,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 06:42:35,877 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 15 transitions. [2020-10-20 06:42:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 15 transitions. [2020-10-20 06:42:35,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-20 06:42:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-20 06:42:35,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2020-10-20 06:42:35,905 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 15 transitions. [2020-10-20 06:42:35,906 INFO L594 BuchiCegarLoop]: Abstraction has 11 states and 15 transitions. [2020-10-20 06:42:35,906 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 06:42:35,906 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 15 transitions. [2020-10-20 06:42:35,907 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-20 06:42:35,907 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:42:35,907 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:42:35,908 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:42:35,908 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-20 06:42:35,908 INFO L794 eck$LassoCheckResult]: Stem: 124#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 120#L-1 havoc main_#res;havoc main_#t~nondet205, main_#t~malloc206.base, main_#t~malloc206.offset, main_#t~nondet208, main_#t~mem209, main_#t~post207, main_#t~mem210, main_~i~0, main_~j~0, main_~length~0, main_~arr~0.base, main_~arr~0.offset;havoc main_~i~0;havoc main_~j~0;main_~length~0 := main_#t~nondet205;havoc main_#t~nondet205; 121#L367 assume !(main_~length~0 < 1); 125#L367-2 call main_#t~malloc206.base, main_#t~malloc206.offset := #Ultimate.allocOnStack(4 * main_~length~0);main_~arr~0.base, main_~arr~0.offset := main_#t~malloc206.base, main_#t~malloc206.offset; 126#L369 assume !(main_~arr~0.base == 0 && main_~arr~0.offset == 0);main_~i~0 := 0; 127#L370-3 assume !(main_~i~0 < main_~length~0); 122#L370-4 main_~j~0 := 1; 123#L377-2 [2020-10-20 06:42:35,909 INFO L796 eck$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 [2020-10-20 06:42:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:42:35,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1806815510, now seen corresponding path program 1 times [2020-10-20 06:42:35,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:42:35,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634468716] [2020-10-20 06:42:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:42:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:42:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:42:35,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634468716] [2020-10-20 06:42:35,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:42:35,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:42:35,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384924003] [2020-10-20 06:42:35,967 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 06:42:35,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:42:35,968 INFO L82 PathProgramCache]: Analyzing trace with hash 73, now seen corresponding path program 1 times [2020-10-20 06:42:35,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:42:35,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616120990] [2020-10-20 06:42:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:42:35,973 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-20 06:42:35,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937933078] [2020-10-20 06:42:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:42:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:42:36,002 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:42:36,005 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:36,008 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:42:36,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:42:36,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:42:36,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:42:36,049 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-10-20 06:42:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:42:36,079 INFO L93 Difference]: Finished difference Result 13 states and 17 transitions. [2020-10-20 06:42:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:42:36,080 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 17 transitions. [2020-10-20 06:42:36,082 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-20 06:42:36,082 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 17 transitions. [2020-10-20 06:42:36,082 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-10-20 06:42:36,082 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-10-20 06:42:36,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 17 transitions. [2020-10-20 06:42:36,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 06:42:36,083 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 17 transitions. [2020-10-20 06:42:36,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 17 transitions. [2020-10-20 06:42:36,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2020-10-20 06:42:36,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-20 06:42:36,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2020-10-20 06:42:36,085 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2020-10-20 06:42:36,086 INFO L594 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2020-10-20 06:42:36,086 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 06:42:36,086 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 14 transitions. [2020-10-20 06:42:36,087 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-20 06:42:36,087 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:42:36,087 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:42:36,088 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:42:36,088 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-20 06:42:36,088 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 [2020-10-20 06:42:36,088 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 [2020-10-20 06:42:36,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:42:36,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1982565540, now seen corresponding path program 1 times [2020-10-20 06:42:36,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:42:36,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196886653] [2020-10-20 06:42:36,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:42:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:42:36,103 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:42:36,116 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:36,121 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:42:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:42:36,121 INFO L82 PathProgramCache]: Analyzing trace with hash 73, now seen corresponding path program 2 times [2020-10-20 06:42:36,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:42:36,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597052139] [2020-10-20 06:42:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:42:36,124 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-20 06:42:36,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116313986] [2020-10-20 06:42:36,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:42:36,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-20 06:42:36,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-10-20 06:42:36,168 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:42:36,171 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:36,174 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:42:36,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:42:36,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1329989554, now seen corresponding path program 1 times [2020-10-20 06:42:36,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:42:36,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628947403] [2020-10-20 06:42:36,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:42:36,187 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-20 06:42:36,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879223520] [2020-10-20 06:42:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:42:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:42:36,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 06:42:36,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:42:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:42:36,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628947403] [2020-10-20 06:42:36,263 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-20 06:42:36,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879223520] [2020-10-20 06:42:36,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-20 06:42:36,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-20 06:42:36,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257271155] [2020-10-20 06:42:36,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:42:36,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 06:42:36,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:42:36,296 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. cyclomatic complexity: 5 Second operand 6 states. [2020-10-20 06:42:36,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:42:36,373 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2020-10-20 06:42:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 06:42:36,373 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 31 transitions. [2020-10-20 06:42:36,375 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-20 06:42:36,375 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 16 states and 20 transitions. [2020-10-20 06:42:36,375 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-10-20 06:42:36,376 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-10-20 06:42:36,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 20 transitions. [2020-10-20 06:42:36,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 06:42:36,376 INFO L691 BuchiCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-10-20 06:42:36,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 20 transitions. [2020-10-20 06:42:36,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-20 06:42:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-20 06:42:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-10-20 06:42:36,378 INFO L714 BuchiCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-10-20 06:42:36,378 INFO L594 BuchiCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-10-20 06:42:36,378 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 06:42:36,378 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 17 transitions. [2020-10-20 06:42:36,379 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-20 06:42:36,379 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:42:36,379 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:42:36,380 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:42:36,380 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-20 06:42:36,380 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 [2020-10-20 06:42:36,380 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 [2020-10-20 06:42:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:42:36,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1781949270, now seen corresponding path program 2 times [2020-10-20 06:42:36,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:42:36,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940729697] [2020-10-20 06:42:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:42:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:42:36,398 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:42:36,411 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:36,416 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:42:36,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:42:36,417 INFO L82 PathProgramCache]: Analyzing trace with hash 73, now seen corresponding path program 3 times [2020-10-20 06:42:36,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:42:36,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666305189] [2020-10-20 06:42:36,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:42:36,420 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-20 06:42:36,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051334957] [2020-10-20 06:42:36,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-20 06:42:36,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-10-20 06:42:36,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-10-20 06:42:36,452 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:42:36,455 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:36,457 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:42:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:42:36,458 INFO L82 PathProgramCache]: Analyzing trace with hash -594147436, now seen corresponding path program 2 times [2020-10-20 06:42:36,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:42:36,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660634488] [2020-10-20 06:42:36,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:42:36,470 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-20 06:42:36,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843559869] [2020-10-20 06:42:36,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:42:36,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 06:42:36,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-10-20 06:42:36,515 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:42:36,524 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:42:36,532 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:42:36,826 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2020-10-20 06:42:36,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 06:42:36 BoogieIcfgContainer [2020-10-20 06:42:36,934 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 06:42:36,934 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:42:36,934 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:42:36,934 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:42:36,935 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:42:34" (3/4) ... [2020-10-20 06:42:36,938 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-10-20 06:42:36,980 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:42:36,980 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:42:36,982 INFO L168 Benchmark]: Toolchain (without parser) took 3907.10 ms. Allocated memory was 43.0 MB in the beginning and 60.8 MB in the end (delta: 17.8 MB). Free memory was 22.4 MB in the beginning and 27.9 MB in the end (delta: -5.5 MB). Peak memory consumption was 12.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:42:36,983 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 32.0 MB. Free memory was 9.5 MB in the beginning and 9.5 MB in the end (delta: 45.8 kB). Peak memory consumption was 45.8 kB. Max. memory is 14.3 GB. [2020-10-20 06:42:36,984 INFO L168 Benchmark]: CACSL2BoogieTranslator took 568.19 ms. Allocated memory was 43.0 MB in the beginning and 45.6 MB in the end (delta: 2.6 MB). Free memory was 21.5 MB in the beginning and 25.1 MB in the end (delta: -3.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. [2020-10-20 06:42:36,984 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.96 ms. Allocated memory is still 45.6 MB. Free memory was 25.1 MB in the beginning and 23.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:42:36,985 INFO L168 Benchmark]: Boogie Preprocessor took 24.39 ms. Allocated memory is still 45.6 MB. Free memory was 23.0 MB in the beginning and 21.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:42:36,985 INFO L168 Benchmark]: RCFGBuilder took 394.44 ms. Allocated memory is still 45.6 MB. Free memory was 21.6 MB in the beginning and 23.4 MB in the end (delta: -1.9 MB). Peak memory consumption was 11.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:42:36,986 INFO L168 Benchmark]: BuchiAutomizer took 2811.38 ms. Allocated memory was 45.6 MB in the beginning and 60.8 MB in the end (delta: 15.2 MB). Free memory was 23.4 MB in the beginning and 29.8 MB in the end (delta: -6.3 MB). Peak memory consumption was 25.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:42:36,987 INFO L168 Benchmark]: Witness Printer took 46.39 ms. Allocated memory is still 60.8 MB. Free memory was 29.8 MB in the beginning and 27.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:42:36,990 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 32.0 MB. Free memory was 9.5 MB in the beginning and 9.5 MB in the end (delta: 45.8 kB). Peak memory consumption was 45.8 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 568.19 ms. Allocated memory was 43.0 MB in the beginning and 45.6 MB in the end (delta: 2.6 MB). Free memory was 21.5 MB in the beginning and 25.1 MB in the end (delta: -3.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 52.96 ms. Allocated memory is still 45.6 MB. Free memory was 25.1 MB in the beginning and 23.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 24.39 ms. Allocated memory is still 45.6 MB. Free memory was 23.0 MB in the beginning and 21.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 394.44 ms. Allocated memory is still 45.6 MB. Free memory was 21.6 MB in the beginning and 23.4 MB in the end (delta: -1.9 MB). Peak memory consumption was 11.1 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 2811.38 ms. Allocated memory was 45.6 MB in the beginning and 60.8 MB in the end (delta: 15.2 MB). Free memory was 23.4 MB in the beginning and 29.8 MB in the end (delta: -6.3 MB). Peak memory consumption was 25.1 MB. Max. memory is 14.3 GB. * Witness Printer took 46.39 ms. Allocated memory is still 60.8 MB. Free memory was 29.8 MB in the beginning and 27.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 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 2.7s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 2.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. 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: inital103 mio100 ax100 hnf99 lsp91 ukn80 mio100 lsp63 div100 bol100 ite100 ukn100 eq166 hnf91 smp100 dnf100 smp100 tf100 neg100 sie102 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 17ms 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@4d1cefc1=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@71f87fa6=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@763faef9=0, length=2, org.eclipse.cdt.internal.core.dom.parser.c.CASTArraySubscriptExpression@2d17397c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@763faef9=2, j=1, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTArraySubscriptExpression@7f2b5730=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@67f63c13=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