./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f2c97cfaf178ecbb63eaaf825cd5ea4b5be1bf37ecd5b20cf7e400328e1cd168 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:05:29,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:05:29,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:05:29,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:05:29,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:05:29,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:05:29,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:05:29,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:05:29,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:05:29,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:05:29,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:05:29,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:05:29,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:05:29,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:05:29,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:05:29,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:05:29,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:05:29,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:05:29,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:05:29,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:05:29,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:05:29,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:05:29,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:05:29,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:05:29,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:05:29,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:05:29,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:05:29,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:05:29,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:05:29,605 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:05:29,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:05:29,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:05:29,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:05:29,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:05:29,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:05:29,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:05:29,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:05:29,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:05:29,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:05:29,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:05:29,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:05:29,616 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 11:05:29,645 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:05:29,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:05:29,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:05:29,649 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:05:29,649 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:05:29,649 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:05:29,650 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 11:05:29,650 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:05:29,656 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:05:29,656 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 11:05:29,657 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 11:05:29,658 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:05:29,658 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 11:05:29,658 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 11:05:29,658 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 11:05:29,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:05:29,659 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:05:29,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 11:05:29,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:05:29,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:05:29,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:05:29,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:05:29,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:05:29,661 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:05:29,661 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:05:29,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:05:29,662 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:05:29,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:05:29,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:05:29,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:05:29,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:05:29,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:05:29,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:05:29,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:05:29,664 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 11:05:29,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 11:05:29,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:05:29,664 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:05:29,664 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:05:29,665 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2c97cfaf178ecbb63eaaf825cd5ea4b5be1bf37ecd5b20cf7e400328e1cd168 [2021-10-24 11:05:29,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:05:29,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:05:29,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:05:29,979 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:05:29,980 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:05:29,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i [2021-10-24 11:05:30,061 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/data/befc16ec3/5e24d64e262d48b18ead34374cffda13/FLAGf4f64385b [2021-10-24 11:05:30,514 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:05:30,522 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i [2021-10-24 11:05:30,531 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/data/befc16ec3/5e24d64e262d48b18ead34374cffda13/FLAGf4f64385b [2021-10-24 11:05:30,879 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/data/befc16ec3/5e24d64e262d48b18ead34374cffda13 [2021-10-24 11:05:30,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:05:30,883 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:05:30,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:05:30,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:05:30,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:05:30,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:05:30" (1/1) ... [2021-10-24 11:05:30,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a296b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:05:30, skipping insertion in model container [2021-10-24 11:05:30,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:05:30" (1/1) ... [2021-10-24 11:05:30,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:05:30,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:05:31,107 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i[951,964] [2021-10-24 11:05:31,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:05:31,129 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:05:31,141 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i[951,964] [2021-10-24 11:05:31,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:05:31,161 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:05:31,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:05:31 WrapperNode [2021-10-24 11:05:31,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:05:31,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:05:31,164 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:05:31,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:05:31,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:05:31" (1/1) ... [2021-10-24 11:05:31,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:05:31" (1/1) ... [2021-10-24 11:05:31,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:05:31,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:05:31,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:05:31,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:05:31,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:05:31" (1/1) ... [2021-10-24 11:05:31,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:05:31" (1/1) ... [2021-10-24 11:05:31,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:05:31" (1/1) ... [2021-10-24 11:05:31,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:05:31" (1/1) ... [2021-10-24 11:05:31,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:05:31" (1/1) ... [2021-10-24 11:05:31,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:05:31" (1/1) ... [2021-10-24 11:05:31,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:05:31" (1/1) ... [2021-10-24 11:05:31,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:05:31,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:05:31,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:05:31,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:05:31,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:05:31" (1/1) ... [2021-10-24 11:05:31,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:05:31,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:05:31,279 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:05:31,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:05:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 11:05:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:05:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:05:31,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:05:33,645 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:05:33,645 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-24 11:05:33,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:05:33 BoogieIcfgContainer [2021-10-24 11:05:33,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:05:33,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:05:33,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:05:33,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:05:33,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:05:30" (1/3) ... [2021-10-24 11:05:33,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d5cebbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:05:33, skipping insertion in model container [2021-10-24 11:05:33,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:05:31" (2/3) ... [2021-10-24 11:05:33,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d5cebbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:05:33, skipping insertion in model container [2021-10-24 11:05:33,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:05:33" (3/3) ... [2021-10-24 11:05:33,656 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound2.i [2021-10-24 11:05:33,663 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:05:33,664 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-24 11:05:33,736 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:05:33,744 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, mAutomataTypeConcurrency=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 [2021-10-24 11:05:33,745 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-24 11:05:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 15 states have internal predecessors, (23), 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) [2021-10-24 11:05:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 11:05:33,779 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:33,779 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 11:05:33,780 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:05:33,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:33,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1384273294, now seen corresponding path program 1 times [2021-10-24 11:05:33,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:05:33,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401154730] [2021-10-24 11:05:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:33,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:05:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:34,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:05:34,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401154730] [2021-10-24 11:05:34,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401154730] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:34,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:34,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 11:05:34,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788120646] [2021-10-24 11:05:34,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 11:05:34,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:05:34,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 11:05:34,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 11:05:34,033 INFO L87 Difference]: Start difference. First operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 15 states have internal predecessors, (23), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-24 11:05:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:34,049 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-10-24 11:05:34,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 11:05:34,051 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-10-24 11:05:34,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:34,059 INFO L225 Difference]: With dead ends: 28 [2021-10-24 11:05:34,059 INFO L226 Difference]: Without dead ends: 14 [2021-10-24 11:05:34,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 11:05:34,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-24 11:05:34,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-24 11:05:34,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 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) [2021-10-24 11:05:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-10-24 11:05:34,096 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 6 [2021-10-24 11:05:34,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:34,097 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-10-24 11:05:34,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-24 11:05:34,098 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-10-24 11:05:34,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-24 11:05:34,099 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:34,099 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:05:34,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 11:05:34,100 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:05:34,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:34,103 INFO L82 PathProgramCache]: Analyzing trace with hash -346058289, now seen corresponding path program 1 times [2021-10-24 11:05:34,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:05:34,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256939004] [2021-10-24 11:05:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:34,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:05:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:34,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:05:34,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256939004] [2021-10-24 11:05:34,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256939004] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:34,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:34,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 11:05:34,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284768551] [2021-10-24 11:05:34,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:05:34,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:05:34,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:05:34,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:05:34,240 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-24 11:05:34,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:34,280 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-10-24 11:05:34,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:05:34,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-10-24 11:05:34,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:34,282 INFO L225 Difference]: With dead ends: 26 [2021-10-24 11:05:34,282 INFO L226 Difference]: Without dead ends: 16 [2021-10-24 11:05:34,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:05:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-24 11:05:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-24 11:05:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 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) [2021-10-24 11:05:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-10-24 11:05:34,290 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 7 [2021-10-24 11:05:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:34,291 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-10-24 11:05:34,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-24 11:05:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-10-24 11:05:34,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 11:05:34,294 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:34,295 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:05:34,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 11:05:34,296 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:05:34,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:34,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2089077620, now seen corresponding path program 1 times [2021-10-24 11:05:34,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:05:34,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276283379] [2021-10-24 11:05:34,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:34,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:05:34,325 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-24 11:05:34,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789860315] [2021-10-24 11:05:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:34,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:05:34,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:05:34,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:05:34,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 11:05:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:34,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:05:34,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:05:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:34,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:05:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:34,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:05:34,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276283379] [2021-10-24 11:05:34,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:05:34,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789860315] [2021-10-24 11:05:34,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789860315] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:34,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:34,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-24 11:05:34,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740789903] [2021-10-24 11:05:34,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:05:34,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:05:34,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:05:34,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-24 11:05:34,962 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-10-24 11:05:37,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:37,333 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-10-24 11:05:37,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 11:05:37,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 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 8 [2021-10-24 11:05:37,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:37,335 INFO L225 Difference]: With dead ends: 43 [2021-10-24 11:05:37,335 INFO L226 Difference]: Without dead ends: 33 [2021-10-24 11:05:37,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:05:37,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-24 11:05:37,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-24 11:05:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 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) [2021-10-24 11:05:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-10-24 11:05:37,341 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 8 [2021-10-24 11:05:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:37,341 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-10-24 11:05:37,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-10-24 11:05:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-10-24 11:05:37,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-24 11:05:37,342 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:37,342 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-24 11:05:37,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 11:05:37,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:05:37,543 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:05:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:37,544 INFO L82 PathProgramCache]: Analyzing trace with hash -10010993, now seen corresponding path program 1 times [2021-10-24 11:05:37,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:05:37,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63474405] [2021-10-24 11:05:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:37,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:05:37,561 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-24 11:05:37,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273453119] [2021-10-24 11:05:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:37,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:05:37,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:05:37,563 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:05:37,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-24 11:05:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:37,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 11:05:37,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:05:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-24 11:05:37,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:05:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-24 11:05:37,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:05:37,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63474405] [2021-10-24 11:05:37,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:05:37,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273453119] [2021-10-24 11:05:37,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273453119] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:37,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:37,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-24 11:05:37,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861328329] [2021-10-24 11:05:37,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 11:05:37,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:05:37,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 11:05:37,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-24 11:05:37,783 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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) [2021-10-24 11:05:37,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:37,830 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-10-24 11:05:37,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:05:37,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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 13 [2021-10-24 11:05:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:37,832 INFO L225 Difference]: With dead ends: 48 [2021-10-24 11:05:37,832 INFO L226 Difference]: Without dead ends: 34 [2021-10-24 11:05:37,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:05:37,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-24 11:05:37,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-10-24 11:05:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 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) [2021-10-24 11:05:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-10-24 11:05:37,838 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 13 [2021-10-24 11:05:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:37,839 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-10-24 11:05:37,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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) [2021-10-24 11:05:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-10-24 11:05:37,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-24 11:05:37,840 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:37,840 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:05:37,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-24 11:05:38,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:05:38,067 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:05:38,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:38,068 INFO L82 PathProgramCache]: Analyzing trace with hash -310378451, now seen corresponding path program 1 times [2021-10-24 11:05:38,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:05:38,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899615622] [2021-10-24 11:05:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:38,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:05:38,082 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-24 11:05:38,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84188565] [2021-10-24 11:05:38,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:38,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:05:38,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:05:38,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:05:38,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-24 11:05:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:38,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 11:05:38,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:05:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 11:05:38,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:05:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-24 11:05:38,630 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:05:38,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899615622] [2021-10-24 11:05:38,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:05:38,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84188565] [2021-10-24 11:05:38,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84188565] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:38,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:38,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-24 11:05:38,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196730850] [2021-10-24 11:05:38,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 11:05:38,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:05:38,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 11:05:38,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:05:38,633 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-10-24 11:05:38,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:38,727 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-10-24 11:05:38,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:05:38,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 14 [2021-10-24 11:05:38,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:38,730 INFO L225 Difference]: With dead ends: 48 [2021-10-24 11:05:38,730 INFO L226 Difference]: Without dead ends: 39 [2021-10-24 11:05:38,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:05:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-24 11:05:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2021-10-24 11:05:38,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 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) [2021-10-24 11:05:38,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-10-24 11:05:38,735 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2021-10-24 11:05:38,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:38,736 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-10-24 11:05:38,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-10-24 11:05:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-10-24 11:05:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-24 11:05:38,737 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:38,737 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:05:38,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-24 11:05:38,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:05:38,951 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:05:38,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:38,952 INFO L82 PathProgramCache]: Analyzing trace with hash -2052410893, now seen corresponding path program 1 times [2021-10-24 11:05:38,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:05:38,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340263891] [2021-10-24 11:05:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:38,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:05:38,962 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-24 11:05:38,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716602989] [2021-10-24 11:05:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:38,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:05:38,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:05:38,964 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:05:38,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-24 11:05:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:39,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 11:05:39,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:05:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:05:39,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:05:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:05:39,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:05:39,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340263891] [2021-10-24 11:05:39,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:05:39,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716602989] [2021-10-24 11:05:39,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716602989] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:39,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:39,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-24 11:05:39,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015341373] [2021-10-24 11:05:39,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 11:05:39,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:05:39,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 11:05:39,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:05:39,208 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-10-24 11:05:39,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:39,248 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-10-24 11:05:39,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 11:05:39,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2021-10-24 11:05:39,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:39,249 INFO L225 Difference]: With dead ends: 26 [2021-10-24 11:05:39,249 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 11:05:39,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-24 11:05:39,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 11:05:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 11:05:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-24 11:05:39,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 11:05:39,251 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-10-24 11:05:39,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:39,252 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 11:05:39,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-10-24 11:05:39,252 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 11:05:39,252 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 11:05:39,255 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:05:39,256 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:05:39,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-24 11:05:39,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-24 11:05:39,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-24 11:05:39,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:05:39,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:05:39,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:05:39,569 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-10-24 11:05:39,570 INFO L857 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-10-24 11:05:39,570 INFO L853 garLoopResultBuilder]: At program point L19-2(line 40) the Hoare annotation is: (and (<= 2 ~counter~0) (< (mod ULTIMATE.start_main_~r~0 4294967296) (mod ULTIMATE.start_main_~b~0 4294967296)) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~A~0 ULTIMATE.start_main_~r~0) (= ULTIMATE.start_main_~b~0 1) (= ULTIMATE.start_main_~q~0 0)) [2021-10-24 11:05:39,570 INFO L857 garLoopResultBuilder]: For program point L19-3(lines 19 22) no Hoare annotation was computed. [2021-10-24 11:05:39,571 INFO L860 garLoopResultBuilder]: At program point L19-5(lines 18 24) the Hoare annotation is: true [2021-10-24 11:05:39,571 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-24 11:05:39,571 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-10-24 11:05:39,571 INFO L857 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-10-24 11:05:39,571 INFO L857 garLoopResultBuilder]: For program point L20-1(lines 20 21) no Hoare annotation was computed. [2021-10-24 11:05:39,572 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-24 11:05:39,572 INFO L857 garLoopResultBuilder]: For program point L38(lines 38 47) no Hoare annotation was computed. [2021-10-24 11:05:39,572 INFO L857 garLoopResultBuilder]: For program point L38-2(lines 38 47) no Hoare annotation was computed. [2021-10-24 11:05:39,572 INFO L857 garLoopResultBuilder]: For program point L34-1(lines 34 37) no Hoare annotation was computed. [2021-10-24 11:05:39,573 INFO L853 garLoopResultBuilder]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~A~0 ULTIMATE.start_main_~r~0)) (.cse1 (= ULTIMATE.start_main_~q~0 0))) (or (and .cse0 (= ~counter~0 0) (= ULTIMATE.start_main_~b~0 1) .cse1) (and (<= 1 ~counter~0) .cse0 .cse1))) [2021-10-24 11:05:39,573 INFO L857 garLoopResultBuilder]: For program point L43-2(lines 26 50) no Hoare annotation was computed. [2021-10-24 11:05:39,573 INFO L857 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2021-10-24 11:05:39,577 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 11:05:39,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:05:39 BoogieIcfgContainer [2021-10-24 11:05:39,592 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 11:05:39,592 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 11:05:39,592 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 11:05:39,593 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 11:05:39,593 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:05:33" (3/4) ... [2021-10-24 11:05:39,596 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 11:05:39,604 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-24 11:05:39,605 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-24 11:05:39,605 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-24 11:05:39,605 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 11:05:39,641 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 11:05:39,641 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 11:05:39,643 INFO L168 Benchmark]: Toolchain (without parser) took 8758.51 ms. Allocated memory was 100.7 MB in the beginning and 134.2 MB in the end (delta: 33.6 MB). Free memory was 60.4 MB in the beginning and 85.1 MB in the end (delta: -24.7 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2021-10-24 11:05:39,643 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 100.7 MB. Free memory is still 76.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:05:39,644 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.12 ms. Allocated memory is still 100.7 MB. Free memory was 60.2 MB in the beginning and 75.5 MB in the end (delta: -15.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-24 11:05:39,644 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.08 ms. Allocated memory is still 100.7 MB. Free memory was 75.5 MB in the beginning and 74.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:05:39,645 INFO L168 Benchmark]: Boogie Preprocessor took 21.28 ms. Allocated memory is still 100.7 MB. Free memory was 74.2 MB in the beginning and 73.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:05:39,645 INFO L168 Benchmark]: RCFGBuilder took 2428.96 ms. Allocated memory is still 100.7 MB. Free memory was 73.0 MB in the beginning and 61.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-24 11:05:39,646 INFO L168 Benchmark]: TraceAbstraction took 5942.31 ms. Allocated memory was 100.7 MB in the beginning and 134.2 MB in the end (delta: 33.6 MB). Free memory was 61.2 MB in the beginning and 88.3 MB in the end (delta: -27.1 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:05:39,646 INFO L168 Benchmark]: Witness Printer took 49.09 ms. Allocated memory is still 134.2 MB. Free memory was 88.3 MB in the beginning and 85.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 11:05:39,649 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 100.7 MB. Free memory is still 76.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 277.12 ms. Allocated memory is still 100.7 MB. Free memory was 60.2 MB in the beginning and 75.5 MB in the end (delta: -15.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.08 ms. Allocated memory is still 100.7 MB. Free memory was 75.5 MB in the beginning and 74.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.28 ms. Allocated memory is still 100.7 MB. Free memory was 74.2 MB in the beginning and 73.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 2428.96 ms. Allocated memory is still 100.7 MB. Free memory was 73.0 MB in the beginning and 61.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5942.31 ms. Allocated memory was 100.7 MB in the beginning and 134.2 MB in the end (delta: 33.6 MB). Free memory was 61.2 MB in the beginning and 88.3 MB in the end (delta: -27.1 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * Witness Printer took 49.09 ms. Allocated memory is still 134.2 MB. Free memory was 88.3 MB in the beginning and 85.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 5843.1ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 27.2ms, AutomataDifference: 2659.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 97.6ms, InitialAbstractionConstructionTime: 12.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 85 SDtfs, 60 SDslu, 133 SDs, 0 SdLazy, 105 SolverSat, 19 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2341.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 313.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=4, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 42.2ms AutomataMinimizationTime, 6 MinimizatonAttempts, 23 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 7 NumberOfFragments, 48 HoareAnnotationTreeSize, 3 FomulaSimplifications, 40 FormulaSimplificationTreeSizeReduction, 24.3ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 13 FormulaSimplificationTreeSizeReductionInter, 67.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 43.8ms SsaConstructionTime, 141.3ms SatisfiabilityAnalysisTime, 1501.2ms InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 103 ConstructedInterpolants, 11 QuantifiedInterpolants, 485 SizeOfPredicates, 14 NumberOfNonLiveVariables, 264 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 40/40 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((2 <= counter && r % 4294967296 < b % 4294967296) && 1 <= cond) && A == r) && b == 1) && q == 0 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((A == r && counter == 0) && b == 1) && q == 0) || ((1 <= counter && A == r) && q == 0) RESULT: Ultimate proved your program to be correct! [2021-10-24 11:05:39,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ac3139-5028-42b3-81c5-a9c8afc92fd8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...