./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/rangesum05.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-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(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0bbcd29b379466a58e055ac550736cd77ce56d9c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-28 22:58:13,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-28 22:58:13,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-28 22:58:13,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-28 22:58:13,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-28 22:58:13,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-28 22:58:13,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-28 22:58:13,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-28 22:58:13,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-28 22:58:13,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-28 22:58:13,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-28 22:58:13,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-28 22:58:13,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-28 22:58:13,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-28 22:58:13,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-28 22:58:13,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-28 22:58:13,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-28 22:58:13,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-28 22:58:13,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-28 22:58:13,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-28 22:58:13,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-28 22:58:13,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-28 22:58:13,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-28 22:58:13,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-28 22:58:13,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-28 22:58:13,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-28 22:58:13,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-28 22:58:13,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-28 22:58:13,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-28 22:58:13,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-28 22:58:13,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-28 22:58:13,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-28 22:58:13,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-28 22:58:13,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-28 22:58:13,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-28 22:58:13,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-28 22:58:13,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-28 22:58:13,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-28 22:58:13,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-28 22:58:13,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-28 22:58:13,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-28 22:58:13,886 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-28 22:58:13,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-28 22:58:13,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-28 22:58:13,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-28 22:58:13,907 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-28 22:58:13,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-28 22:58:13,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-28 22:58:13,908 INFO L138 SettingsManager]: * Use SBE=true [2021-08-28 22:58:13,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-28 22:58:13,909 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-28 22:58:13,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-28 22:58:13,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-28 22:58:13,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-28 22:58:13,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-28 22:58:13,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-28 22:58:13,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-28 22:58:13,910 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-28 22:58:13,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-28 22:58:13,910 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-28 22:58:13,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-28 22:58:13,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-28 22:58:13,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-28 22:58:13,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-28 22:58:13,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-28 22:58:13,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-28 22:58:13,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-28 22:58:13,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-28 22:58:13,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-28 22:58:13,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-28 22:58:13,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-28 22:58:13,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-28 22:58:13,918 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bbcd29b379466a58e055ac550736cd77ce56d9c [2021-08-28 22:58:14,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-28 22:58:14,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-28 22:58:14,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-28 22:58:14,152 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-28 22:58:14,153 INFO L275 PluginConnector]: CDTParser initialized [2021-08-28 22:58:14,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-08-28 22:58:14,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b28a3a0b/a4537962ce3b434296cd9ededceffd7c/FLAG3576f8236 [2021-08-28 22:58:14,501 INFO L306 CDTParser]: Found 1 translation units. [2021-08-28 22:58:14,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-08-28 22:58:14,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b28a3a0b/a4537962ce3b434296cd9ededceffd7c/FLAG3576f8236 [2021-08-28 22:58:14,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b28a3a0b/a4537962ce3b434296cd9ededceffd7c [2021-08-28 22:58:14,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-28 22:58:14,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-28 22:58:14,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-28 22:58:14,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-28 22:58:14,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-28 22:58:14,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.08 10:58:14" (1/1) ... [2021-08-28 22:58:14,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39a6bf89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:14, skipping insertion in model container [2021-08-28 22:58:14,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.08 10:58:14" (1/1) ... [2021-08-28 22:58:14,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-28 22:58:14,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-28 22:58:15,070 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-08-28 22:58:15,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-28 22:58:15,077 INFO L203 MainTranslator]: Completed pre-run [2021-08-28 22:58:15,095 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-08-28 22:58:15,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-28 22:58:15,105 INFO L208 MainTranslator]: Completed translation [2021-08-28 22:58:15,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:15 WrapperNode [2021-08-28 22:58:15,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-28 22:58:15,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-28 22:58:15,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-28 22:58:15,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-28 22:58:15,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:15" (1/1) ... [2021-08-28 22:58:15,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:15" (1/1) ... [2021-08-28 22:58:15,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-28 22:58:15,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-28 22:58:15,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-28 22:58:15,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-28 22:58:15,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:15" (1/1) ... [2021-08-28 22:58:15,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:15" (1/1) ... [2021-08-28 22:58:15,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:15" (1/1) ... [2021-08-28 22:58:15,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:15" (1/1) ... [2021-08-28 22:58:15,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:15" (1/1) ... [2021-08-28 22:58:15,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:15" (1/1) ... [2021-08-28 22:58:15,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:15" (1/1) ... [2021-08-28 22:58:15,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-28 22:58:15,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-28 22:58:15,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-28 22:58:15,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-28 22:58:15,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:15" (1/1) ... [2021-08-28 22:58:15,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-28 22:58:15,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:15,281 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-28 22:58:15,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-28 22:58:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-28 22:58:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-28 22:58:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-28 22:58:15,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-28 22:58:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-28 22:58:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-28 22:58:15,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-28 22:58:15,516 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-28 22:58:15,517 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-28 22:58:15,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.08 10:58:15 BoogieIcfgContainer [2021-08-28 22:58:15,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-28 22:58:15,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-28 22:58:15,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-28 22:58:15,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-28 22:58:15,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.08 10:58:14" (1/3) ... [2021-08-28 22:58:15,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18eefad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.08 10:58:15, skipping insertion in model container [2021-08-28 22:58:15,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:15" (2/3) ... [2021-08-28 22:58:15,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18eefad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.08 10:58:15, skipping insertion in model container [2021-08-28 22:58:15,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.08 10:58:15" (3/3) ... [2021-08-28 22:58:15,525 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2021-08-28 22:58:15,529 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-28 22:58:15,530 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-28 22:58:15,572 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-28 22:58:15,578 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-28 22:58:15,578 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-28 22:58:15,589 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-28 22:58:15,594 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:15,594 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:15,595 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:15,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:15,599 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-08-28 22:58:15,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:15,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334819256] [2021-08-28 22:58:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:15,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-28 22:58:15,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:15,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334819256] [2021-08-28 22:58:15,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334819256] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-28 22:58:15,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-28 22:58:15,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-28 22:58:15,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511958904] [2021-08-28 22:58:15,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-28 22:58:15,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:15,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-28 22:58:15,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-28 22:58:15,817 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:15,928 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2021-08-28 22:58:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-28 22:58:15,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-28 22:58:15,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:15,938 INFO L225 Difference]: With dead ends: 58 [2021-08-28 22:58:15,938 INFO L226 Difference]: Without dead ends: 28 [2021-08-28 22:58:15,941 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.41ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-28 22:58:15,943 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.96ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.10ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:15,944 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 79 Unknown, 0 Unchecked, 0.96ms Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 80.10ms Time] [2021-08-28 22:58:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-28 22:58:15,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-08-28 22:58:15,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-08-28 22:58:15,966 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2021-08-28 22:58:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:15,966 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-08-28 22:58:15,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-08-28 22:58:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-28 22:58:15,967 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:15,967 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:15,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-28 22:58:15,968 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:15,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:15,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2021-08-28 22:58:15,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:15,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333914155] [2021-08-28 22:58:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:15,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-28 22:58:16,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:16,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333914155] [2021-08-28 22:58:16,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333914155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-28 22:58:16,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310479943] [2021-08-28 22:58:16,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:16,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:16,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:16,020 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-28 22:58:16,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-28 22:58:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:16,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-28 22:58:16,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-28 22:58:16,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-28 22:58:16,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310479943] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-28 22:58:16,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-28 22:58:16,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-28 22:58:16,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533650612] [2021-08-28 22:58:16,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-28 22:58:16,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-28 22:58:16,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:16,173 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:16,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:16,258 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2021-08-28 22:58:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-28 22:58:16,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-28 22:58:16,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:16,259 INFO L225 Difference]: With dead ends: 57 [2021-08-28 22:58:16,261 INFO L226 Difference]: Without dead ends: 36 [2021-08-28 22:58:16,262 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.02ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:16,263 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.64ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.03ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:16,263 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.64ms Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 77.03ms Time] [2021-08-28 22:58:16,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-28 22:58:16,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-08-28 22:58:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-08-28 22:58:16,271 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2021-08-28 22:58:16,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:16,271 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-08-28 22:58:16,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-08-28 22:58:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-28 22:58:16,274 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:16,274 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:16,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:16,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:16,490 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:16,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:16,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2021-08-28 22:58:16,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:16,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947759590] [2021-08-28 22:58:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:16,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-28 22:58:16,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:16,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947759590] [2021-08-28 22:58:16,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947759590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-28 22:58:16,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457014357] [2021-08-28 22:58:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:16,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:16,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:16,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-28 22:58:16,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-28 22:58:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:16,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-28 22:58:16,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-28 22:58:16,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-28 22:58:16,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457014357] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-28 22:58:16,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-28 22:58:16,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-28 22:58:16,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857852009] [2021-08-28 22:58:16,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-28 22:58:16,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:16,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-28 22:58:16,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:16,700 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:16,745 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-08-28 22:58:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-28 22:58:16,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-28 22:58:16,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:16,746 INFO L225 Difference]: With dead ends: 46 [2021-08-28 22:58:16,746 INFO L226 Difference]: Without dead ends: 35 [2021-08-28 22:58:16,747 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.37ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:16,747 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.44ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.80ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:16,748 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 71 Unknown, 0 Unchecked, 0.44ms Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 39.80ms Time] [2021-08-28 22:58:16,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-28 22:58:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-08-28 22:58:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-08-28 22:58:16,755 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2021-08-28 22:58:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:16,755 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-08-28 22:58:16,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-08-28 22:58:16,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-28 22:58:16,756 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:16,756 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:16,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:16,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-28 22:58:16,973 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:16,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:16,974 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2021-08-28 22:58:16,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:16,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974194860] [2021-08-28 22:58:16,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:16,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-28 22:58:17,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:17,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974194860] [2021-08-28 22:58:17,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974194860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-28 22:58:17,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678390860] [2021-08-28 22:58:17,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:17,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:17,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:17,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-28 22:58:17,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-28 22:58:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:17,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-28 22:58:17,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-28 22:58:17,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-28 22:58:17,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678390860] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-28 22:58:17,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-28 22:58:17,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-28 22:58:17,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317367823] [2021-08-28 22:58:17,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-28 22:58:17,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:17,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-28 22:58:17,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:17,138 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:17,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:17,224 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2021-08-28 22:58:17,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-28 22:58:17,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-28 22:58:17,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:17,225 INFO L225 Difference]: With dead ends: 78 [2021-08-28 22:58:17,225 INFO L226 Difference]: Without dead ends: 56 [2021-08-28 22:58:17,226 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.15ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:17,226 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.61ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.66ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:17,227 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.61ms Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 76.66ms Time] [2021-08-28 22:58:17,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-28 22:58:17,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-08-28 22:58:17,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2021-08-28 22:58:17,232 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2021-08-28 22:58:17,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:17,232 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2021-08-28 22:58:17,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:17,233 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2021-08-28 22:58:17,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-28 22:58:17,234 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:17,234 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:17,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:17,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:17,439 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:17,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:17,439 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2021-08-28 22:58:17,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:17,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744552817] [2021-08-28 22:58:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:17,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-28 22:58:17,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:17,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744552817] [2021-08-28 22:58:17,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744552817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-28 22:58:17,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223551159] [2021-08-28 22:58:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:17,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:17,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:17,485 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-28 22:58:17,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-28 22:58:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:17,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-28 22:58:17,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-28 22:58:17,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-28 22:58:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-28 22:58:17,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223551159] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-28 22:58:17,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-28 22:58:17,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-08-28 22:58:17,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336522239] [2021-08-28 22:58:17,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-28 22:58:17,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:17,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-28 22:58:17,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-28 22:58:17,695 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:17,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:17,756 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2021-08-28 22:58:17,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-28 22:58:17,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-28 22:58:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:17,757 INFO L225 Difference]: With dead ends: 93 [2021-08-28 22:58:17,757 INFO L226 Difference]: Without dead ends: 52 [2021-08-28 22:58:17,757 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24.84ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-28 22:58:17,758 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.78ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.20ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:17,758 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 0.78ms Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 52.20ms Time] [2021-08-28 22:58:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-28 22:58:17,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-08-28 22:58:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 68 transitions. [2021-08-28 22:58:17,762 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 68 transitions. Word has length 30 [2021-08-28 22:58:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:17,763 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 68 transitions. [2021-08-28 22:58:17,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 68 transitions. [2021-08-28 22:58:17,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-28 22:58:17,763 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:17,764 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:17,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:17,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:17,969 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:17,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:17,969 INFO L82 PathProgramCache]: Analyzing trace with hash -195520200, now seen corresponding path program 2 times [2021-08-28 22:58:17,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:17,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862924852] [2021-08-28 22:58:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:17,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-08-28 22:58:18,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:18,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862924852] [2021-08-28 22:58:18,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862924852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-28 22:58:18,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609792944] [2021-08-28 22:58:18,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-28 22:58:18,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:18,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:18,046 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-28 22:58:18,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-28 22:58:18,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-28 22:58:18,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-28 22:58:18,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-28 22:58:18,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-28 22:58:18,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-28 22:58:18,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609792944] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-28 22:58:18,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-28 22:58:18,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-08-28 22:58:18,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224325087] [2021-08-28 22:58:18,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-28 22:58:18,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:18,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-28 22:58:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-28 22:58:18,240 INFO L87 Difference]: Start difference. First operand 52 states and 68 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:18,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:18,379 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2021-08-28 22:58:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-28 22:58:18,380 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-28 22:58:18,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:18,381 INFO L225 Difference]: With dead ends: 118 [2021-08-28 22:58:18,381 INFO L226 Difference]: Without dead ends: 113 [2021-08-28 22:58:18,381 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.10ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-28 22:58:18,382 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.33ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.03ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:18,382 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 179 Unknown, 0 Unchecked, 2.33ms Time], IncrementalHoareTripleChecker [8 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 115.03ms Time] [2021-08-28 22:58:18,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-28 22:58:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2021-08-28 22:58:18,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.3421052631578947) internal successors, (102), 76 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2021-08-28 22:58:18,388 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 36 [2021-08-28 22:58:18,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:18,389 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2021-08-28 22:58:18,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:18,389 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2021-08-28 22:58:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-28 22:58:18,390 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:18,390 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:18,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:18,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:18,607 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:18,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:18,608 INFO L82 PathProgramCache]: Analyzing trace with hash 570616873, now seen corresponding path program 1 times [2021-08-28 22:58:18,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:18,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874116826] [2021-08-28 22:58:18,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:18,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:18,624 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-28 22:58:18,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828620705] [2021-08-28 22:58:18,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:18,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:18,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:18,637 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-28 22:58:18,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-28 22:58:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:18,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-28 22:58:18,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-28 22:58:18,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-28 22:58:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-28 22:58:18,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:18,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874116826] [2021-08-28 22:58:18,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-28 22:58:18,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828620705] [2021-08-28 22:58:18,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828620705] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-28 22:58:18,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-28 22:58:18,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-28 22:58:18,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159415641] [2021-08-28 22:58:18,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-28 22:58:18,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:18,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-28 22:58:18,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-28 22:58:18,853 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:18,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:18,931 INFO L93 Difference]: Finished difference Result 145 states and 195 transitions. [2021-08-28 22:58:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-28 22:58:18,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-28 22:58:18,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:18,933 INFO L225 Difference]: With dead ends: 145 [2021-08-28 22:58:18,933 INFO L226 Difference]: Without dead ends: 79 [2021-08-28 22:58:18,933 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.01ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-28 22:58:18,934 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.49ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.95ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:18,934 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 146 Unknown, 0 Unchecked, 0.49ms Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 70.95ms Time] [2021-08-28 22:58:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-28 22:58:18,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-08-28 22:58:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2021-08-28 22:58:18,940 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 39 [2021-08-28 22:58:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:18,940 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2021-08-28 22:58:18,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:18,944 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2021-08-28 22:58:18,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-28 22:58:18,945 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:18,945 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:18,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:19,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:19,146 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:19,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:19,147 INFO L82 PathProgramCache]: Analyzing trace with hash 667539687, now seen corresponding path program 2 times [2021-08-28 22:58:19,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:19,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519198998] [2021-08-28 22:58:19,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:19,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:19,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-28 22:58:19,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116372291] [2021-08-28 22:58:19,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-28 22:58:19,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:19,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:19,162 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-28 22:58:19,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-28 22:58:19,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-28 22:58:19,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-28 22:58:19,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-28 22:58:19,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-28 22:58:19,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-28 22:58:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-28 22:58:19,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:19,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519198998] [2021-08-28 22:58:19,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-28 22:58:19,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116372291] [2021-08-28 22:58:19,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116372291] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-28 22:58:19,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-28 22:58:19,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-28 22:58:19,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221641704] [2021-08-28 22:58:19,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-28 22:58:19,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-28 22:58:19,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-28 22:58:19,337 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:19,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:19,419 INFO L93 Difference]: Finished difference Result 175 states and 245 transitions. [2021-08-28 22:58:19,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-28 22:58:19,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-28 22:58:19,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:19,420 INFO L225 Difference]: With dead ends: 175 [2021-08-28 22:58:19,420 INFO L226 Difference]: Without dead ends: 115 [2021-08-28 22:58:19,420 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.33ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-28 22:58:19,421 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.73ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.66ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:19,421 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 141 Unknown, 0 Unchecked, 0.73ms Time], IncrementalHoareTripleChecker [30 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 72.66ms Time] [2021-08-28 22:58:19,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-28 22:58:19,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2021-08-28 22:58:19,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 99 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:19,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2021-08-28 22:58:19,427 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 41 [2021-08-28 22:58:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:19,427 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2021-08-28 22:58:19,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:19,427 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2021-08-28 22:58:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-28 22:58:19,428 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:19,428 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:19,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:19,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:19,646 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:19,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:19,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1092210085, now seen corresponding path program 1 times [2021-08-28 22:58:19,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:19,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061622485] [2021-08-28 22:58:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:19,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:19,656 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-28 22:58:19,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468832259] [2021-08-28 22:58:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:19,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:19,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:19,661 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-28 22:58:19,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-28 22:58:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:19,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-28 22:58:19,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-08-28 22:58:19,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-28 22:58:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-08-28 22:58:19,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:19,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061622485] [2021-08-28 22:58:19,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-28 22:58:19,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468832259] [2021-08-28 22:58:19,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468832259] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-28 22:58:19,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-28 22:58:19,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-28 22:58:19,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538776314] [2021-08-28 22:58:19,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-28 22:58:19,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:19,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-28 22:58:19,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:19,909 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:19,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:19,976 INFO L93 Difference]: Finished difference Result 178 states and 218 transitions. [2021-08-28 22:58:19,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-28 22:58:19,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-28 22:58:19,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:19,977 INFO L225 Difference]: With dead ends: 178 [2021-08-28 22:58:19,977 INFO L226 Difference]: Without dead ends: 100 [2021-08-28 22:58:19,977 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.08ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:19,980 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.75ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.91ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:19,981 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 123 Unknown, 0 Unchecked, 0.75ms Time], IncrementalHoareTripleChecker [15 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 60.91ms Time] [2021-08-28 22:58:19,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-28 22:58:19,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-08-28 22:58:19,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 99 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2021-08-28 22:58:19,999 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 65 [2021-08-28 22:58:19,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:19,999 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2021-08-28 22:58:19,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:19,999 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2021-08-28 22:58:20,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-28 22:58:20,002 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:20,002 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:20,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:20,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-28 22:58:20,204 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:20,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:20,204 INFO L82 PathProgramCache]: Analyzing trace with hash 35998627, now seen corresponding path program 2 times [2021-08-28 22:58:20,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:20,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882281893] [2021-08-28 22:58:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:20,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:20,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-28 22:58:20,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315526505] [2021-08-28 22:58:20,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-28 22:58:20,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:20,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:20,219 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-28 22:58:20,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-28 22:58:20,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-28 22:58:20,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-28 22:58:20,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-28 22:58:20,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-08-28 22:58:20,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-28 22:58:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-08-28 22:58:20,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:20,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882281893] [2021-08-28 22:58:20,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-28 22:58:20,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315526505] [2021-08-28 22:58:20,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315526505] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-28 22:58:20,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-28 22:58:20,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-28 22:58:20,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660370955] [2021-08-28 22:58:20,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-28 22:58:20,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:20,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-28 22:58:20,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-28 22:58:20,492 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:20,575 INFO L93 Difference]: Finished difference Result 188 states and 227 transitions. [2021-08-28 22:58:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-28 22:58:20,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-28 22:58:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:20,576 INFO L225 Difference]: With dead ends: 188 [2021-08-28 22:58:20,576 INFO L226 Difference]: Without dead ends: 115 [2021-08-28 22:58:20,576 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.09ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-28 22:58:20,577 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.84ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.53ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:20,577 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 156 Unknown, 0 Unchecked, 0.84ms Time], IncrementalHoareTripleChecker [39 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 74.53ms Time] [2021-08-28 22:58:20,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-28 22:58:20,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-08-28 22:58:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 114 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 136 transitions. [2021-08-28 22:58:20,586 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 136 transitions. Word has length 65 [2021-08-28 22:58:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:20,587 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 136 transitions. [2021-08-28 22:58:20,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 136 transitions. [2021-08-28 22:58:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-28 22:58:20,588 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:20,588 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:20,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:20,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-28 22:58:20,793 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:20,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash -422485954, now seen corresponding path program 3 times [2021-08-28 22:58:20,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:20,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252218260] [2021-08-28 22:58:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:20,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:20,803 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-28 22:58:20,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899483796] [2021-08-28 22:58:20,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-28 22:58:20,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:20,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:20,810 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-28 22:58:20,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-28 22:58:20,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-28 22:58:20,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-28 22:58:20,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-28 22:58:20,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-08-28 22:58:20,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-28 22:58:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-08-28 22:58:21,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:21,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252218260] [2021-08-28 22:58:21,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-28 22:58:21,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899483796] [2021-08-28 22:58:21,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899483796] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-28 22:58:21,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-28 22:58:21,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-28 22:58:21,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807539062] [2021-08-28 22:58:21,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-28 22:58:21,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:21,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-28 22:58:21,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-28 22:58:21,090 INFO L87 Difference]: Start difference. First operand 115 states and 136 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:21,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:21,162 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2021-08-28 22:58:21,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-28 22:58:21,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-08-28 22:58:21,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:21,164 INFO L225 Difference]: With dead ends: 167 [2021-08-28 22:58:21,164 INFO L226 Difference]: Without dead ends: 127 [2021-08-28 22:58:21,164 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.33ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-28 22:58:21,165 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.44ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.02ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:21,165 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 147 Unknown, 0 Unchecked, 0.44ms Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 66.02ms Time] [2021-08-28 22:58:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-28 22:58:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-08-28 22:58:21,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.1746031746031746) internal successors, (148), 126 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:21,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 148 transitions. [2021-08-28 22:58:21,169 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 148 transitions. Word has length 74 [2021-08-28 22:58:21,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:21,169 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 148 transitions. [2021-08-28 22:58:21,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:21,170 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 148 transitions. [2021-08-28 22:58:21,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-28 22:58:21,171 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:21,171 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:21,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:21,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-28 22:58:21,389 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:21,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1620561476, now seen corresponding path program 4 times [2021-08-28 22:58:21,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:21,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388200628] [2021-08-28 22:58:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:21,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:21,397 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-28 22:58:21,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892779441] [2021-08-28 22:58:21,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-28 22:58:21,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:21,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:21,398 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-28 22:58:21,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-28 22:58:21,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-28 22:58:21,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-28 22:58:21,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-28 22:58:21,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-28 22:58:21,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-28 22:58:21,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:21,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388200628] [2021-08-28 22:58:21,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-28 22:58:21,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892779441] [2021-08-28 22:58:21,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892779441] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-28 22:58:21,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-28 22:58:21,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-28 22:58:21,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067286442] [2021-08-28 22:58:21,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-28 22:58:21,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:21,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-28 22:58:21,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:21,603 INFO L87 Difference]: Start difference. First operand 127 states and 148 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:21,670 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2021-08-28 22:58:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-28 22:58:21,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-28 22:58:21,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:21,671 INFO L225 Difference]: With dead ends: 186 [2021-08-28 22:58:21,671 INFO L226 Difference]: Without dead ends: 108 [2021-08-28 22:58:21,671 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.88ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:21,672 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.53ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.25ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:21,672 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.53ms Time], IncrementalHoareTripleChecker [9 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 58.25ms Time] [2021-08-28 22:58:21,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-28 22:58:21,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2021-08-28 22:58:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2021-08-28 22:58:21,675 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 80 [2021-08-28 22:58:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:21,675 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2021-08-28 22:58:21,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-28 22:58:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2021-08-28 22:58:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-28 22:58:21,676 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:21,677 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:21,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:21,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-28 22:58:21,886 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:21,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:21,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1345801862, now seen corresponding path program 1 times [2021-08-28 22:58:21,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:21,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806722792] [2021-08-28 22:58:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:21,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:21,894 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-28 22:58:21,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13212315] [2021-08-28 22:58:21,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:21,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:21,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:21,898 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-28 22:58:21,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-28 22:58:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-28 22:58:22,008 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-28 22:58:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-28 22:58:22,268 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-28 22:58:22,268 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-28 22:58:22,269 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-28 22:58:22,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:22,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-28 22:58:22,485 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-28 22:58:22,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.08 10:58:22 BoogieIcfgContainer [2021-08-28 22:58:22,564 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-28 22:58:22,565 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-28 22:58:22,565 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-28 22:58:22,565 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-28 22:58:22,566 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.08 10:58:15" (3/4) ... [2021-08-28 22:58:22,567 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-28 22:58:22,629 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-28 22:58:22,629 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-28 22:58:22,629 INFO L158 Benchmark]: Toolchain (without parser) took 7700.28ms. Allocated memory was 52.4MB in the beginning and 75.5MB in the end (delta: 23.1MB). Free memory was 29.5MB in the beginning and 44.8MB in the end (delta: -15.3MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2021-08-28 22:58:22,629 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 52.4MB. Free memory was 34.4MB in the beginning and 34.4MB in the end (delta: 37.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-28 22:58:22,630 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.28ms. Allocated memory is still 52.4MB. Free memory was 29.3MB in the beginning and 32.9MB in the end (delta: -3.6MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. [2021-08-28 22:58:22,630 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.99ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 32.9MB in the beginning and 45.7MB in the end (delta: -12.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-28 22:58:22,630 INFO L158 Benchmark]: Boogie Preprocessor took 51.27ms. Allocated memory is still 62.9MB. Free memory was 45.7MB in the beginning and 44.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-28 22:58:22,630 INFO L158 Benchmark]: RCFGBuilder took 282.06ms. Allocated memory is still 62.9MB. Free memory was 44.1MB in the beginning and 33.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-28 22:58:22,631 INFO L158 Benchmark]: TraceAbstraction took 7044.70ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 33.3MB in the beginning and 51.7MB in the end (delta: -18.4MB). Peak memory consumption was 28.2MB. Max. memory is 16.1GB. [2021-08-28 22:58:22,631 INFO L158 Benchmark]: Witness Printer took 63.99ms. Allocated memory is still 75.5MB. Free memory was 51.7MB in the beginning and 44.8MB in the end (delta: 6.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-08-28 22:58:22,632 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 52.4MB. Free memory was 34.4MB in the beginning and 34.4MB in the end (delta: 37.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 178.28ms. Allocated memory is still 52.4MB. Free memory was 29.3MB in the beginning and 32.9MB in the end (delta: -3.6MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 73.99ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 32.9MB in the beginning and 45.7MB in the end (delta: -12.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.27ms. Allocated memory is still 62.9MB. Free memory was 45.7MB in the beginning and 44.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 282.06ms. Allocated memory is still 62.9MB. Free memory was 44.1MB in the beginning and 33.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 7044.70ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 33.3MB in the beginning and 51.7MB in the end (delta: -18.4MB). Peak memory consumption was 28.2MB. Max. memory is 16.1GB. * Witness Printer took 63.99ms. Allocated memory is still 75.5MB. Free memory was 51.7MB in the beginning and 44.8MB in the end (delta: 6.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[5]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 5) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<5 -1) [L57] x[5 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6912.07ms, OverallIterations: 13, TraceHistogramMax: 5, EmptinessCheckTime: 18.10ms, AutomataDifference: 1072.01ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 7.89ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 264 SdHoareTripleChecker+Valid, 844.13ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 264 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 616.85ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 598 mSDsCounter, 128 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1280 IncrementalHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 128 mSolverCounterUnsat, 0 mSDtfsCounter, 1280 mSolverCounterSat, 9.53ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 828 GetRequests, 778 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 189.61ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=127occurred in iteration=11, InterpolantAutomatonStates: 62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 83.79ms AutomataMinimizationTime, 12 MinimizatonAttempts, 93 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 150.87ms SsaConstructionTime, 387.35ms SatisfiabilityAnalysisTime, 1836.78ms InterpolantComputationTime, 747 NumberOfCodeBlocks, 684 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 958 ConstructedInterpolants, 0 QuantifiedInterpolants, 1290 SizeOfPredicates, 5 NumberOfNonLiveVariables, 1882 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 23 InterpolantComputations, 6 PerfectInterpolantSequences, 864/965 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-28 22:58:22,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...